vtlim commented on code in PR #14742:
URL: https://github.com/apache/druid/pull/14742#discussion_r1284864644


##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."

Review Comment:
   ```suggestion
       "Use the `/list` endpoint to get the data generator's available 
configuration values with pre-defined data generator schemas."
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."

Review Comment:
   ```suggestion
       "To interact with the data generation service, use the REST client 
provided in the [`druidapi` Python 
package](https://druid.apache.org/docs/latest/tutorials/tutorial-jupyter-index.html#python-api-for-druid)."
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",
+    "- \"path\" within the \"target\" is only a filename, it will ignore any 
path specified on the file.\n",
+    "- The data generator simulates time when you specify a start time in the 
\"time_type\" property and a duration in the \"time\" property.\n",
+    "- \"concurrency\" indicates the maximum number of entities used 
concurrently to generate events. Each entity is a separate state machine that 
simulates things like user sessions, IoT devices, or other concurrent sources 
of event data. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "811ff58f-75af-4092-a08d-5e07a51592ff",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import datetime, timedelta\n",
+    "import json\n",
+    "\n",
+    "# determine start time, in this example we are starting one hour ago \n",
+    "startDateTime = (datetime.now() - timedelta(hours = 
1)).strftime('%Y-%m-%dT%H:%M:%S.001')\n",
+    "print(f\"Starting to generate history at {startDateTime}.\")\n",
+    "\n",
+    "job_name=\"gen_clickstream1\"\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "# this request if generating a data file at on the datagen server\n",
+    "datagen_request = {\n",
+    "    \"name\": job_name,\n",
+    "    \"target\": { \"type\": \"file\", \"path\":\"clicks.json\"},\n",
+    "    \"config_file\": \"clickstream/clickstream.json\", \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":100,\n",
+    "    \"time_type\": startDateTime\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d407d1d9-3f01-4128-a014-6a5f371c25a5",
+   "metadata": {},
+   "source": [
+    "### Display jobs\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3de698c5-bcf4-40c7-b295-728fb54d1f0a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\").json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "972ebed0-34a1-4ad2-909d-69b8b27c3046",
+   "metadata": {},
+   "source": [
+    "### Get status of a job\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "debce4f8-9c16-476c-9593-21ec984985d2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/status/{job_name}\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ef818d78-6aa6-4d38-8a43-83416aede96f",
+   "metadata": {},
+   "source": [
+    "### Stop a job\n",
+    "Use the /stop/\\<job_name> API to stop a job."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7631b8b8-d3d6-4803-9162-587f440d2ef2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.post(f\"/stop/{job_name}\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0a8dc7d3-64e5-41e3-8c28-c5f19c0536f5",
+   "metadata": {},
+   "source": [
+    "### List files created on datagen server\n",
+    "Use the /files API to list files available on the server."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "06ee36bd-2d2b-4904-9987-10636cf52aac",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/files\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "83ef9edb-98e2-45b4-88e8-578703faedc1",
+   "metadata": {},
+   "source": [
+    "### Batch Loading of Generated Files\n",
+    "Use a [Druid HTTP input 
source](https://druid.apache.org/docs/latest/ingestion/native-batch-input-sources.html#http-input-source)
 in the [EXTERN 
function](https://druid.apache.org/docs/latest/multi-stage-query/reference.html#extern-function)
 of a [SQL Based 
ingestion](https://druid.apache.org/docs/latest/multi-stage-query/index.html) 
to load generated files.\n",
+    "The files can be accessed by name using the 
`http://datagen:9999/file/<name of the file>` or if ingesting into a Druid 
instance outside of docker, but still running locally, then use 
`http://localhost:9999/file/<name of the file>`.\n",
+    "The following example assumes that both Druid and the data generator 
server are running in docker compose."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0d72b015-f8ec-4713-b6f2-fe7a15afff59",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "sql = '''\n",
+    "REPLACE INTO \"clicks\" OVERWRITE ALL\n",
+    "WITH \"ext\" AS (SELECT *\n",
+    "FROM TABLE(\n",
+    "  EXTERN(\n",
+    "    
'{\"type\":\"http\",\"uris\":[\"http://datagen:9999/file/clicks.json\"]}',\n",
+    "    '{\"type\":\"json\"}'\n",
+    "  )\n",
+    ") EXTEND (\"time\" VARCHAR, \"user_id\" VARCHAR, \"event_type\" VARCHAR, 
\"client_ip\" VARCHAR, \"client_device\" VARCHAR, \"client_lang\" VARCHAR, 
\"client_country\" VARCHAR, \"referrer\" VARCHAR, \"keyword\" VARCHAR, 
\"product\" VARCHAR))\n",
+    "SELECT\n",
+    "  TIME_PARSE(\"time\") AS \"__time\",\n",
+    "  \"user_id\",\n",
+    "  \"event_type\",\n",
+    "  \"client_ip\",\n",
+    "  \"client_device\",\n",
+    "  \"client_lang\",\n",
+    "  \"client_country\",\n",
+    "  \"referrer\",\n",
+    "  \"keyword\",\n",
+    "  \"product\"\n",
+    "FROM \"ext\"\n",
+    "PARTITIONED BY DAY\n",
+    "'''\n",
+    "druid.sql.run_task(sql)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b0997b38-02c2-483e-bd15-439c4bf0097a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "druid.display.sql('''\n",
+    "SELECT  event_type, \n",
+    "        count( DISTINCT \"user_id\") users, \n",
+    "        count( DISTINCT \"client_ip\") ips, \n",
+    "        count( DISTINCT \"client_ip\") - count( DISTINCT \"user_id\") 
ips_minus_users\n",
+    "FROM \"clicks\"\n",
+    "GROUP BY 1\n",
+    "HAVING count( DISTINCT \"user_id\") - count( DISTINCT \"client_ip\") < 
0\n",
+    "ORDER BY 4 DESC\n",
+    "''')\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "66ec013f-28e4-4d5a-94a6-06e0ed537b4e",
+   "metadata": {},
+   "source": [
+    "## Generating custom data\n",

Review Comment:
   ```suggestion
       "## Generate custom data\n",
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",
+    "- \"path\" within the \"target\" is only a filename, it will ignore any 
path specified on the file.\n",
+    "- The data generator simulates time when you specify a start time in the 
\"time_type\" property and a duration in the \"time\" property.\n",
+    "- \"concurrency\" indicates the maximum number of entities used 
concurrently to generate events. Each entity is a separate state machine that 
simulates things like user sessions, IoT devices, or other concurrent sources 
of event data. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "811ff58f-75af-4092-a08d-5e07a51592ff",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import datetime, timedelta\n",
+    "import json\n",
+    "\n",
+    "# determine start time, in this example we are starting one hour ago \n",
+    "startDateTime = (datetime.now() - timedelta(hours = 
1)).strftime('%Y-%m-%dT%H:%M:%S.001')\n",
+    "print(f\"Starting to generate history at {startDateTime}.\")\n",
+    "\n",
+    "job_name=\"gen_clickstream1\"\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "# this request if generating a data file at on the datagen server\n",
+    "datagen_request = {\n",
+    "    \"name\": job_name,\n",
+    "    \"target\": { \"type\": \"file\", \"path\":\"clicks.json\"},\n",
+    "    \"config_file\": \"clickstream/clickstream.json\", \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":100,\n",
+    "    \"time_type\": startDateTime\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d407d1d9-3f01-4128-a014-6a5f371c25a5",
+   "metadata": {},
+   "source": [
+    "### Display jobs\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3de698c5-bcf4-40c7-b295-728fb54d1f0a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\").json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "972ebed0-34a1-4ad2-909d-69b8b27c3046",
+   "metadata": {},
+   "source": [
+    "### Get status of a job\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "debce4f8-9c16-476c-9593-21ec984985d2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/status/{job_name}\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ef818d78-6aa6-4d38-8a43-83416aede96f",
+   "metadata": {},
+   "source": [
+    "### Stop a job\n",
+    "Use the /stop/\\<job_name> API to stop a job."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7631b8b8-d3d6-4803-9162-587f440d2ef2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.post(f\"/stop/{job_name}\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0a8dc7d3-64e5-41e3-8c28-c5f19c0536f5",
+   "metadata": {},
+   "source": [
+    "### List files created on datagen server\n",
+    "Use the /files API to list files available on the server."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "06ee36bd-2d2b-4904-9987-10636cf52aac",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/files\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "83ef9edb-98e2-45b4-88e8-578703faedc1",
+   "metadata": {},
+   "source": [
+    "### Batch Loading of Generated Files\n",

Review Comment:
   ```suggestion
       "### Batch ingestion from generated files\n",
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",
+    "- \"path\" within the \"target\" is only a filename, it will ignore any 
path specified on the file.\n",
+    "- The data generator simulates time when you specify a start time in the 
\"time_type\" property and a duration in the \"time\" property.\n",
+    "- \"concurrency\" indicates the maximum number of entities used 
concurrently to generate events. Each entity is a separate state machine that 
simulates things like user sessions, IoT devices, or other concurrent sources 
of event data. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "811ff58f-75af-4092-a08d-5e07a51592ff",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import datetime, timedelta\n",
+    "import json\n",
+    "\n",
+    "# determine start time, in this example we are starting one hour ago \n",
+    "startDateTime = (datetime.now() - timedelta(hours = 
1)).strftime('%Y-%m-%dT%H:%M:%S.001')\n",
+    "print(f\"Starting to generate history at {startDateTime}.\")\n",
+    "\n",
+    "job_name=\"gen_clickstream1\"\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "# this request if generating a data file at on the datagen server\n",
+    "datagen_request = {\n",
+    "    \"name\": job_name,\n",
+    "    \"target\": { \"type\": \"file\", \"path\":\"clicks.json\"},\n",
+    "    \"config_file\": \"clickstream/clickstream.json\", \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":100,\n",
+    "    \"time_type\": startDateTime\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d407d1d9-3f01-4128-a014-6a5f371c25a5",
+   "metadata": {},
+   "source": [
+    "### Display jobs\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3de698c5-bcf4-40c7-b295-728fb54d1f0a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\").json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "972ebed0-34a1-4ad2-909d-69b8b27c3046",
+   "metadata": {},
+   "source": [
+    "### Get status of a job\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "debce4f8-9c16-476c-9593-21ec984985d2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/status/{job_name}\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ef818d78-6aa6-4d38-8a43-83416aede96f",
+   "metadata": {},
+   "source": [
+    "### Stop a job\n",
+    "Use the /stop/\\<job_name> API to stop a job."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7631b8b8-d3d6-4803-9162-587f440d2ef2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.post(f\"/stop/{job_name}\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0a8dc7d3-64e5-41e3-8c28-c5f19c0536f5",
+   "metadata": {},
+   "source": [
+    "### List files created on datagen server\n",
+    "Use the /files API to list files available on the server."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "06ee36bd-2d2b-4904-9987-10636cf52aac",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/files\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "83ef9edb-98e2-45b4-88e8-578703faedc1",
+   "metadata": {},
+   "source": [
+    "### Batch Loading of Generated Files\n",
+    "Use a [Druid HTTP input 
source](https://druid.apache.org/docs/latest/ingestion/native-batch-input-sources.html#http-input-source)
 in the [EXTERN 
function](https://druid.apache.org/docs/latest/multi-stage-query/reference.html#extern-function)
 of a [SQL Based 
ingestion](https://druid.apache.org/docs/latest/multi-stage-query/index.html) 
to load generated files.\n",
+    "The files can be accessed by name using the 
`http://datagen:9999/file/<name of the file>` or if ingesting into a Druid 
instance outside of docker, but still running locally, then use 
`http://localhost:9999/file/<name of the file>`.\n",
+    "The following example assumes that both Druid and the data generator 
server are running in docker compose."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0d72b015-f8ec-4713-b6f2-fe7a15afff59",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "sql = '''\n",
+    "REPLACE INTO \"clicks\" OVERWRITE ALL\n",
+    "WITH \"ext\" AS (SELECT *\n",
+    "FROM TABLE(\n",
+    "  EXTERN(\n",
+    "    
'{\"type\":\"http\",\"uris\":[\"http://datagen:9999/file/clicks.json\"]}',\n",
+    "    '{\"type\":\"json\"}'\n",
+    "  )\n",
+    ") EXTEND (\"time\" VARCHAR, \"user_id\" VARCHAR, \"event_type\" VARCHAR, 
\"client_ip\" VARCHAR, \"client_device\" VARCHAR, \"client_lang\" VARCHAR, 
\"client_country\" VARCHAR, \"referrer\" VARCHAR, \"keyword\" VARCHAR, 
\"product\" VARCHAR))\n",
+    "SELECT\n",
+    "  TIME_PARSE(\"time\") AS \"__time\",\n",
+    "  \"user_id\",\n",
+    "  \"event_type\",\n",
+    "  \"client_ip\",\n",
+    "  \"client_device\",\n",
+    "  \"client_lang\",\n",
+    "  \"client_country\",\n",
+    "  \"referrer\",\n",
+    "  \"keyword\",\n",
+    "  \"product\"\n",
+    "FROM \"ext\"\n",
+    "PARTITIONED BY DAY\n",
+    "'''\n",
+    "druid.sql.run_task(sql)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b0997b38-02c2-483e-bd15-439c4bf0097a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "druid.display.sql('''\n",
+    "SELECT  event_type, \n",
+    "        count( DISTINCT \"user_id\") users, \n",
+    "        count( DISTINCT \"client_ip\") ips, \n",
+    "        count( DISTINCT \"client_ip\") - count( DISTINCT \"user_id\") 
ips_minus_users\n",
+    "FROM \"clicks\"\n",
+    "GROUP BY 1\n",
+    "HAVING count( DISTINCT \"user_id\") - count( DISTINCT \"client_ip\") < 
0\n",
+    "ORDER BY 4 DESC\n",
+    "''')\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "66ec013f-28e4-4d5a-94a6-06e0ed537b4e",
+   "metadata": {},
+   "source": [
+    "## Generating custom data\n",
+    "\n",
+    "You can fine the full set of configuration option in the [data generator 
project's 
readme](https://github.com/implydata/druid-datagenerator#data-generator-configuration).\n",
+    "\n",
+    "In this section we use a simple custom configuration as an example to 
generate some data."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d6451310-b7dd-4b39-a23b-7b735b152d6c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "gen_config = {\n",
+    "  \"emitters\": [\n",
+    "    {\n",
+    "      \"name\": \"simple_record\",\n",
+    "      \"dimensions\": [\n",
+    "        {\n",
+    "          \"type\": \"string\",\n",
+    "          \"name\": \"random_string_column\",\n",
+    "          \"length_distribution\": {\n",
+    "            \"type\": \"constant\",\n",
+    "            \"value\": 13\n",
+    "          },\n",
+    "          \"cardinality\": 0,\n",
+    "          \"chars\": \"#.abcdefghijklmnopqrstuvwxyz\"\n",
+    "        },\n",
+    "        {\n",
+    "          \"type\": \"int\",\n",
+    "          \"name\": \"distributed_number\",\n",
+    "          \"distribution\": {\n",
+    "            \"type\": \"uniform\",\n",
+    "            \"min\": 0,\n",
+    "            \"max\": 1000\n",
+    "          },\n",
+    "          \"cardinality\": 10,\n",
+    "          \"cardinality_distribution\": {\n",
+    "            \"type\": \"exponential\",\n",
+    "            \"mean\": 5\n",
+    "          }\n",
+    "        }\n",
+    "      ]\n",
+    "    }\n",
+    "  ],\n",
+    "  \"interarrival\": {\n",
+    "    \"type\": \"constant\",\n",
+    "    \"value\": 1\n",
+    "  },\n",
+    "  \"states\": [\n",
+    "    {\n",
+    "      \"name\": \"state_1\",\n",
+    "      \"emitter\": \"simple_record\",\n",
+    "      \"delay\": {\n",
+    "        \"type\": \"constant\",\n",
+    "        \"value\": 1\n",
+    "      },\n",
+    "      \"transitions\": [\n",
+    "        {\n",
+    "          \"next\": \"state_1\",\n",
+    "          \"probability\": 1.0\n",
+    "        }\n",
+    "      ]\n",
+    "    }\n",
+    "  ]\n",
+    "}\n",
+    "\n",
+    "target = { \"type\":\"file\", \"path\":\"sample_data.json\"}"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "89a22645-aea5-4c15-b81a-959b27df731f",
+   "metadata": {},
+   "source": [
+    "Now, instead of using a config_file, we use the config attribute of the 
request to use our new custom data generator."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "e5e5c535-3474-42b4-9772-14279e712f3d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# generate 1 hour of simulated time using custom configuration\n",
+    "datagen_request = {\n",
+    "    \"name\": \"sample_custom\",\n",
+    "    \"target\": target,\n",
+    "    \"config\": gen_config, \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":10,\n",
+    "    \"time_type\": \"SIM\"\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "952386f7-8181-4325-972b-5f30dc12cf21",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "470b3a2a-4fd9-45a2-9221-497d906f62a9",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "\n",
+    "display( datagen.get(f\"/file/sample_data.json\").content[:1024])"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "77bff054-0f16-4fd5-8ade-2d44b30d0cf2",
+   "metadata": {},
+   "source": [
+    "## Streaming generated data\n",
+    "\n",
+    "The data generator works exactly the same whether it is writing data to a 
file or publishing messages into a stream. You  only need to change the target 
configuration.\n",
+    "\n",
+    "To use the Kafka container running on Docker Compose, use the host name 
`kafka:9092`. This piece of code uses the KAFKA_HOST environment variable from 
Docker Compose to specify the Kafka host. "

Review Comment:
   ```suggestion
       "To use the Kafka container running on Docker Compose, use the host name 
`kafka:9092`. This tutorial uses the KAFKA_HOST environment variable from 
Docker Compose to specify the Kafka host. "
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",

Review Comment:
   Also note that I added `name` and context for the utility for this property.



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+    "The default docker compose deployment includes a data generation service 
created from the published docker image `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available `config_file` values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes it is useful to be able to 
select the start time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",
+    "- \"path\" within the \"target\" is only a filename, it will ignore any 
path specified on the file.\n",
+    "- The data generator simulates time when you specify a start time in the 
\"time_type\" property and a duration in the \"time\" property.\n",
+    "- \"concurrency\" indicates the maximum number of entities used 
concurrently to generate events. Each entity is a separate state machine that 
simulates things like user sessions, IoT devices, or other concurrent sources 
of event data. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "811ff58f-75af-4092-a08d-5e07a51592ff",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import datetime, timedelta\n",
+    "import json\n",
+    "\n",
+    "# determine start time, in this example we are starting one hour ago \n",
+    "startDateTime = (datetime.now() - timedelta(hours = 
1)).strftime('%Y-%m-%dT%H:%M:%S.001')\n",
+    "print(f\"Starting to generate history at {startDateTime}.\")\n",
+    "\n",
+    "job_name=\"gen_clickstream1\"\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "# this request if generating a data file at on the datagen server\n",
+    "datagen_request = {\n",
+    "    \"name\": job_name,\n",
+    "    \"target\": { \"type\": \"file\", \"path\":\"clicks.json\"},\n",
+    "    \"config_file\": \"clickstream/clickstream.json\", \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":100,\n",
+    "    \"time_type\": startDateTime\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d407d1d9-3f01-4128-a014-6a5f371c25a5",
+   "metadata": {},
+   "source": [
+    "### Display jobs\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3de698c5-bcf4-40c7-b295-728fb54d1f0a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\").json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "972ebed0-34a1-4ad2-909d-69b8b27c3046",
+   "metadata": {},
+   "source": [
+    "### Get status of a job\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "debce4f8-9c16-476c-9593-21ec984985d2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/status/{job_name}\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ef818d78-6aa6-4d38-8a43-83416aede96f",
+   "metadata": {},
+   "source": [
+    "### Stop a job\n",
+    "Use the /stop/\\<job_name> API to stop a job."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7631b8b8-d3d6-4803-9162-587f440d2ef2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.post(f\"/stop/{job_name}\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0a8dc7d3-64e5-41e3-8c28-c5f19c0536f5",
+   "metadata": {},
+   "source": [
+    "### List files created on datagen server\n",
+    "Use the /files API to list files available on the server."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "06ee36bd-2d2b-4904-9987-10636cf52aac",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/files\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "83ef9edb-98e2-45b4-88e8-578703faedc1",
+   "metadata": {},
+   "source": [
+    "### Batch Loading of Generated Files\n",
+    "Use a [Druid HTTP input 
source](https://druid.apache.org/docs/latest/ingestion/native-batch-input-sources.html#http-input-source)
 in the [EXTERN 
function](https://druid.apache.org/docs/latest/multi-stage-query/reference.html#extern-function)
 of a [SQL Based 
ingestion](https://druid.apache.org/docs/latest/multi-stage-query/index.html) 
to load generated files.\n",
+    "The files can be accessed by name using the 
`http://datagen:9999/file/<name of the file>` or if ingesting into a Druid 
instance outside of docker, but still running locally, then use 
`http://localhost:9999/file/<name of the file>`.\n",
+    "The following example assumes that both Druid and the data generator 
server are running in docker compose."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0d72b015-f8ec-4713-b6f2-fe7a15afff59",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "sql = '''\n",
+    "REPLACE INTO \"clicks\" OVERWRITE ALL\n",
+    "WITH \"ext\" AS (SELECT *\n",
+    "FROM TABLE(\n",
+    "  EXTERN(\n",
+    "    
'{\"type\":\"http\",\"uris\":[\"http://datagen:9999/file/clicks.json\"]}',\n",
+    "    '{\"type\":\"json\"}'\n",
+    "  )\n",
+    ") EXTEND (\"time\" VARCHAR, \"user_id\" VARCHAR, \"event_type\" VARCHAR, 
\"client_ip\" VARCHAR, \"client_device\" VARCHAR, \"client_lang\" VARCHAR, 
\"client_country\" VARCHAR, \"referrer\" VARCHAR, \"keyword\" VARCHAR, 
\"product\" VARCHAR))\n",
+    "SELECT\n",
+    "  TIME_PARSE(\"time\") AS \"__time\",\n",
+    "  \"user_id\",\n",
+    "  \"event_type\",\n",
+    "  \"client_ip\",\n",
+    "  \"client_device\",\n",
+    "  \"client_lang\",\n",
+    "  \"client_country\",\n",
+    "  \"referrer\",\n",
+    "  \"keyword\",\n",
+    "  \"product\"\n",
+    "FROM \"ext\"\n",
+    "PARTITIONED BY DAY\n",
+    "'''\n",
+    "druid.sql.run_task(sql)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b0997b38-02c2-483e-bd15-439c4bf0097a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "druid.display.sql('''\n",
+    "SELECT  event_type, \n",
+    "        count( DISTINCT \"user_id\") users, \n",
+    "        count( DISTINCT \"client_ip\") ips, \n",
+    "        count( DISTINCT \"client_ip\") - count( DISTINCT \"user_id\") 
ips_minus_users\n",
+    "FROM \"clicks\"\n",
+    "GROUP BY 1\n",
+    "HAVING count( DISTINCT \"user_id\") - count( DISTINCT \"client_ip\") < 
0\n",
+    "ORDER BY 4 DESC\n",
+    "''')\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "66ec013f-28e4-4d5a-94a6-06e0ed537b4e",
+   "metadata": {},
+   "source": [
+    "## Generating custom data\n",
+    "\n",
+    "You can fine the full set of configuration option in the [data generator 
project's 
readme](https://github.com/implydata/druid-datagenerator#data-generator-configuration).\n",

Review Comment:
   `README` should be capitalized



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",

Review Comment:
   Suggest using a parallel structure to describe each of the properties for 
consistency and ease of reading. For example:
   ```
   * `name`: an arbitrary name you assign to the job. Refer to the job name to 
get the job status or to stop the job.
   * `target.type`: <description>
   * `target.path`: <description>
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]

Review Comment:
   Suggest adding a preview of what this notebook will teach the user, and a 
table of contents. Similar to how it's done in the other tutorials.



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",
+    "- \"path\" within the \"target\" is only a filename, it will ignore any 
path specified on the file.\n",
+    "- The data generator simulates time when you specify a start time in the 
\"time_type\" property and a duration in the \"time\" property.\n",
+    "- \"concurrency\" indicates the maximum number of entities used 
concurrently to generate events. Each entity is a separate state machine that 
simulates things like user sessions, IoT devices, or other concurrent sources 
of event data. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "811ff58f-75af-4092-a08d-5e07a51592ff",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import datetime, timedelta\n",
+    "import json\n",
+    "\n",
+    "# determine start time, in this example we are starting one hour ago \n",
+    "startDateTime = (datetime.now() - timedelta(hours = 
1)).strftime('%Y-%m-%dT%H:%M:%S.001')\n",
+    "print(f\"Starting to generate history at {startDateTime}.\")\n",
+    "\n",
+    "job_name=\"gen_clickstream1\"\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "# this request if generating a data file at on the datagen server\n",
+    "datagen_request = {\n",
+    "    \"name\": job_name,\n",
+    "    \"target\": { \"type\": \"file\", \"path\":\"clicks.json\"},\n",
+    "    \"config_file\": \"clickstream/clickstream.json\", \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":100,\n",

Review Comment:
   Since you describe `time` and `time_type` together, it might help to have 
these together in the request too. That is, switch the order of `concurrency` 
and `time_type`.



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",

Review Comment:
   ```suggestion
       "### Generate a data file for backfilling history\n",
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",

Review Comment:
   ```suggestion
       "This example shows how to configure the data generator request:\n",
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",
+    "- \"path\" within the \"target\" is only a filename, it will ignore any 
path specified on the file.\n",
+    "- The data generator simulates time when you specify a start time in the 
\"time_type\" property and a duration in the \"time\" property.\n",
+    "- \"concurrency\" indicates the maximum number of entities used 
concurrently to generate events. Each entity is a separate state machine that 
simulates things like user sessions, IoT devices, or other concurrent sources 
of event data. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "811ff58f-75af-4092-a08d-5e07a51592ff",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import datetime, timedelta\n",
+    "import json\n",
+    "\n",
+    "# determine start time, in this example we are starting one hour ago \n",
+    "startDateTime = (datetime.now() - timedelta(hours = 
1)).strftime('%Y-%m-%dT%H:%M:%S.001')\n",
+    "print(f\"Starting to generate history at {startDateTime}.\")\n",
+    "\n",
+    "job_name=\"gen_clickstream1\"\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "# this request if generating a data file at on the datagen server\n",
+    "datagen_request = {\n",
+    "    \"name\": job_name,\n",
+    "    \"target\": { \"type\": \"file\", \"path\":\"clicks.json\"},\n",
+    "    \"config_file\": \"clickstream/clickstream.json\", \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":100,\n",
+    "    \"time_type\": startDateTime\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d407d1d9-3f01-4128-a014-6a5f371c25a5",
+   "metadata": {},
+   "source": [
+    "### Display jobs\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3de698c5-bcf4-40c7-b295-728fb54d1f0a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\").json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "972ebed0-34a1-4ad2-909d-69b8b27c3046",
+   "metadata": {},
+   "source": [
+    "### Get status of a job\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "debce4f8-9c16-476c-9593-21ec984985d2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/status/{job_name}\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ef818d78-6aa6-4d38-8a43-83416aede96f",
+   "metadata": {},
+   "source": [
+    "### Stop a job\n",
+    "Use the /stop/\\<job_name> API to stop a job."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7631b8b8-d3d6-4803-9162-587f440d2ef2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.post(f\"/stop/{job_name}\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0a8dc7d3-64e5-41e3-8c28-c5f19c0536f5",
+   "metadata": {},
+   "source": [
+    "### List files created on datagen server\n",
+    "Use the /files API to list files available on the server."

Review Comment:
   ```suggestion
       "Use the `/files` API endpoint to list files available on the server."
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",
+    "- \"path\" within the \"target\" is only a filename, it will ignore any 
path specified on the file.\n",
+    "- The data generator simulates time when you specify a start time in the 
\"time_type\" property and a duration in the \"time\" property.\n",
+    "- \"concurrency\" indicates the maximum number of entities used 
concurrently to generate events. Each entity is a separate state machine that 
simulates things like user sessions, IoT devices, or other concurrent sources 
of event data. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "811ff58f-75af-4092-a08d-5e07a51592ff",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import datetime, timedelta\n",
+    "import json\n",
+    "\n",
+    "# determine start time, in this example we are starting one hour ago \n",
+    "startDateTime = (datetime.now() - timedelta(hours = 
1)).strftime('%Y-%m-%dT%H:%M:%S.001')\n",
+    "print(f\"Starting to generate history at {startDateTime}.\")\n",
+    "\n",
+    "job_name=\"gen_clickstream1\"\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "# this request if generating a data file at on the datagen server\n",
+    "datagen_request = {\n",
+    "    \"name\": job_name,\n",
+    "    \"target\": { \"type\": \"file\", \"path\":\"clicks.json\"},\n",
+    "    \"config_file\": \"clickstream/clickstream.json\", \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":100,\n",
+    "    \"time_type\": startDateTime\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d407d1d9-3f01-4128-a014-6a5f371c25a5",
+   "metadata": {},
+   "source": [
+    "### Display jobs\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3de698c5-bcf4-40c7-b295-728fb54d1f0a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\").json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "972ebed0-34a1-4ad2-909d-69b8b27c3046",
+   "metadata": {},
+   "source": [
+    "### Get status of a job\n",
+    "Use the /jobs API to get the current jobs and their status."

Review Comment:
   ```suggestion
       "Use the `/jobs` endpoint to get the current jobs and their statuses."
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",
+    "- \"path\" within the \"target\" is only a filename, it will ignore any 
path specified on the file.\n",
+    "- The data generator simulates time when you specify a start time in the 
\"time_type\" property and a duration in the \"time\" property.\n",
+    "- \"concurrency\" indicates the maximum number of entities used 
concurrently to generate events. Each entity is a separate state machine that 
simulates things like user sessions, IoT devices, or other concurrent sources 
of event data. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "811ff58f-75af-4092-a08d-5e07a51592ff",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import datetime, timedelta\n",
+    "import json\n",
+    "\n",
+    "# determine start time, in this example we are starting one hour ago \n",
+    "startDateTime = (datetime.now() - timedelta(hours = 
1)).strftime('%Y-%m-%dT%H:%M:%S.001')\n",
+    "print(f\"Starting to generate history at {startDateTime}.\")\n",
+    "\n",
+    "job_name=\"gen_clickstream1\"\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "# this request if generating a data file at on the datagen server\n",
+    "datagen_request = {\n",
+    "    \"name\": job_name,\n",
+    "    \"target\": { \"type\": \"file\", \"path\":\"clicks.json\"},\n",
+    "    \"config_file\": \"clickstream/clickstream.json\", \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":100,\n",
+    "    \"time_type\": startDateTime\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d407d1d9-3f01-4128-a014-6a5f371c25a5",
+   "metadata": {},
+   "source": [
+    "### Display jobs\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3de698c5-bcf4-40c7-b295-728fb54d1f0a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\").json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "972ebed0-34a1-4ad2-909d-69b8b27c3046",
+   "metadata": {},
+   "source": [
+    "### Get status of a job\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "debce4f8-9c16-476c-9593-21ec984985d2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/status/{job_name}\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ef818d78-6aa6-4d38-8a43-83416aede96f",
+   "metadata": {},
+   "source": [
+    "### Stop a job\n",
+    "Use the /stop/\\<job_name> API to stop a job."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7631b8b8-d3d6-4803-9162-587f440d2ef2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.post(f\"/stop/{job_name}\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0a8dc7d3-64e5-41e3-8c28-c5f19c0536f5",
+   "metadata": {},
+   "source": [
+    "### List files created on datagen server\n",
+    "Use the /files API to list files available on the server."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "06ee36bd-2d2b-4904-9987-10636cf52aac",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/files\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "83ef9edb-98e2-45b4-88e8-578703faedc1",
+   "metadata": {},
+   "source": [
+    "### Batch Loading of Generated Files\n",
+    "Use a [Druid HTTP input 
source](https://druid.apache.org/docs/latest/ingestion/native-batch-input-sources.html#http-input-source)
 in the [EXTERN 
function](https://druid.apache.org/docs/latest/multi-stage-query/reference.html#extern-function)
 of a [SQL Based 
ingestion](https://druid.apache.org/docs/latest/multi-stage-query/index.html) 
to load generated files.\n",

Review Comment:
   ```suggestion
       "Use a [Druid HTTP input 
source](https://druid.apache.org/docs/latest/ingestion/native-batch-input-sources.html#http-input-source)
 in the [EXTERN 
function](https://druid.apache.org/docs/latest/multi-stage-query/reference.html#extern-function)
 of a [SQL-based 
ingestion](https://druid.apache.org/docs/latest/multi-stage-query/index.html) 
to load generated files.\n",
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",
+    "- \"path\" within the \"target\" is only a filename, it will ignore any 
path specified on the file.\n",
+    "- The data generator simulates time when you specify a start time in the 
\"time_type\" property and a duration in the \"time\" property.\n",
+    "- \"concurrency\" indicates the maximum number of entities used 
concurrently to generate events. Each entity is a separate state machine that 
simulates things like user sessions, IoT devices, or other concurrent sources 
of event data. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "811ff58f-75af-4092-a08d-5e07a51592ff",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import datetime, timedelta\n",
+    "import json\n",
+    "\n",
+    "# determine start time, in this example we are starting one hour ago \n",
+    "startDateTime = (datetime.now() - timedelta(hours = 
1)).strftime('%Y-%m-%dT%H:%M:%S.001')\n",
+    "print(f\"Starting to generate history at {startDateTime}.\")\n",
+    "\n",
+    "job_name=\"gen_clickstream1\"\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "# this request if generating a data file at on the datagen server\n",
+    "datagen_request = {\n",
+    "    \"name\": job_name,\n",
+    "    \"target\": { \"type\": \"file\", \"path\":\"clicks.json\"},\n",
+    "    \"config_file\": \"clickstream/clickstream.json\", \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":100,\n",
+    "    \"time_type\": startDateTime\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d407d1d9-3f01-4128-a014-6a5f371c25a5",
+   "metadata": {},
+   "source": [
+    "### Display jobs\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3de698c5-bcf4-40c7-b295-728fb54d1f0a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\").json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "972ebed0-34a1-4ad2-909d-69b8b27c3046",
+   "metadata": {},
+   "source": [
+    "### Get status of a job\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "debce4f8-9c16-476c-9593-21ec984985d2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/status/{job_name}\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ef818d78-6aa6-4d38-8a43-83416aede96f",
+   "metadata": {},
+   "source": [
+    "### Stop a job\n",
+    "Use the /stop/\\<job_name> API to stop a job."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7631b8b8-d3d6-4803-9162-587f440d2ef2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.post(f\"/stop/{job_name}\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0a8dc7d3-64e5-41e3-8c28-c5f19c0536f5",
+   "metadata": {},
+   "source": [
+    "### List files created on datagen server\n",
+    "Use the /files API to list files available on the server."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "06ee36bd-2d2b-4904-9987-10636cf52aac",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/files\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "83ef9edb-98e2-45b4-88e8-578703faedc1",
+   "metadata": {},
+   "source": [
+    "### Batch Loading of Generated Files\n",
+    "Use a [Druid HTTP input 
source](https://druid.apache.org/docs/latest/ingestion/native-batch-input-sources.html#http-input-source)
 in the [EXTERN 
function](https://druid.apache.org/docs/latest/multi-stage-query/reference.html#extern-function)
 of a [SQL Based 
ingestion](https://druid.apache.org/docs/latest/multi-stage-query/index.html) 
to load generated files.\n",
+    "The files can be accessed by name using the 
`http://datagen:9999/file/<name of the file>` or if ingesting into a Druid 
instance outside of docker, but still running locally, then use 
`http://localhost:9999/file/<name of the file>`.\n",
+    "The following example assumes that both Druid and the data generator 
server are running in docker compose."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0d72b015-f8ec-4713-b6f2-fe7a15afff59",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "sql = '''\n",
+    "REPLACE INTO \"clicks\" OVERWRITE ALL\n",
+    "WITH \"ext\" AS (SELECT *\n",
+    "FROM TABLE(\n",
+    "  EXTERN(\n",
+    "    
'{\"type\":\"http\",\"uris\":[\"http://datagen:9999/file/clicks.json\"]}',\n",
+    "    '{\"type\":\"json\"}'\n",
+    "  )\n",
+    ") EXTEND (\"time\" VARCHAR, \"user_id\" VARCHAR, \"event_type\" VARCHAR, 
\"client_ip\" VARCHAR, \"client_device\" VARCHAR, \"client_lang\" VARCHAR, 
\"client_country\" VARCHAR, \"referrer\" VARCHAR, \"keyword\" VARCHAR, 
\"product\" VARCHAR))\n",
+    "SELECT\n",
+    "  TIME_PARSE(\"time\") AS \"__time\",\n",
+    "  \"user_id\",\n",
+    "  \"event_type\",\n",
+    "  \"client_ip\",\n",
+    "  \"client_device\",\n",
+    "  \"client_lang\",\n",
+    "  \"client_country\",\n",
+    "  \"referrer\",\n",
+    "  \"keyword\",\n",
+    "  \"product\"\n",
+    "FROM \"ext\"\n",
+    "PARTITIONED BY DAY\n",
+    "'''\n",
+    "druid.sql.run_task(sql)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b0997b38-02c2-483e-bd15-439c4bf0097a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "druid.display.sql('''\n",
+    "SELECT  event_type, \n",
+    "        count( DISTINCT \"user_id\") users, \n",
+    "        count( DISTINCT \"client_ip\") ips, \n",
+    "        count( DISTINCT \"client_ip\") - count( DISTINCT \"user_id\") 
ips_minus_users\n",
+    "FROM \"clicks\"\n",
+    "GROUP BY 1\n",
+    "HAVING count( DISTINCT \"user_id\") - count( DISTINCT \"client_ip\") < 
0\n",
+    "ORDER BY 4 DESC\n",
+    "''')\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "66ec013f-28e4-4d5a-94a6-06e0ed537b4e",
+   "metadata": {},
+   "source": [
+    "## Generating custom data\n",
+    "\n",
+    "You can fine the full set of configuration option in the [data generator 
project's 
readme](https://github.com/implydata/druid-datagenerator#data-generator-configuration).\n",
+    "\n",
+    "In this section we use a simple custom configuration as an example to 
generate some data."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d6451310-b7dd-4b39-a23b-7b735b152d6c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "gen_config = {\n",
+    "  \"emitters\": [\n",
+    "    {\n",
+    "      \"name\": \"simple_record\",\n",
+    "      \"dimensions\": [\n",
+    "        {\n",
+    "          \"type\": \"string\",\n",
+    "          \"name\": \"random_string_column\",\n",
+    "          \"length_distribution\": {\n",
+    "            \"type\": \"constant\",\n",
+    "            \"value\": 13\n",
+    "          },\n",
+    "          \"cardinality\": 0,\n",
+    "          \"chars\": \"#.abcdefghijklmnopqrstuvwxyz\"\n",
+    "        },\n",
+    "        {\n",
+    "          \"type\": \"int\",\n",
+    "          \"name\": \"distributed_number\",\n",
+    "          \"distribution\": {\n",
+    "            \"type\": \"uniform\",\n",
+    "            \"min\": 0,\n",
+    "            \"max\": 1000\n",
+    "          },\n",
+    "          \"cardinality\": 10,\n",
+    "          \"cardinality_distribution\": {\n",
+    "            \"type\": \"exponential\",\n",
+    "            \"mean\": 5\n",
+    "          }\n",
+    "        }\n",
+    "      ]\n",
+    "    }\n",
+    "  ],\n",
+    "  \"interarrival\": {\n",
+    "    \"type\": \"constant\",\n",
+    "    \"value\": 1\n",
+    "  },\n",
+    "  \"states\": [\n",
+    "    {\n",
+    "      \"name\": \"state_1\",\n",
+    "      \"emitter\": \"simple_record\",\n",
+    "      \"delay\": {\n",
+    "        \"type\": \"constant\",\n",
+    "        \"value\": 1\n",
+    "      },\n",
+    "      \"transitions\": [\n",
+    "        {\n",
+    "          \"next\": \"state_1\",\n",
+    "          \"probability\": 1.0\n",
+    "        }\n",
+    "      ]\n",
+    "    }\n",
+    "  ]\n",
+    "}\n",
+    "\n",
+    "target = { \"type\":\"file\", \"path\":\"sample_data.json\"}"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "89a22645-aea5-4c15-b81a-959b27df731f",
+   "metadata": {},
+   "source": [
+    "Now, instead of using a config_file, we use the config attribute of the 
request to use our new custom data generator."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "e5e5c535-3474-42b4-9772-14279e712f3d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# generate 1 hour of simulated time using custom configuration\n",
+    "datagen_request = {\n",
+    "    \"name\": \"sample_custom\",\n",
+    "    \"target\": target,\n",
+    "    \"config\": gen_config, \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":10,\n",
+    "    \"time_type\": \"SIM\"\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "952386f7-8181-4325-972b-5f30dc12cf21",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "470b3a2a-4fd9-45a2-9221-497d906f62a9",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "\n",
+    "display( datagen.get(f\"/file/sample_data.json\").content[:1024])"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "77bff054-0f16-4fd5-8ade-2d44b30d0cf2",
+   "metadata": {},
+   "source": [
+    "## Streaming generated data\n",

Review Comment:
   ```suggestion
       "## Stream generated data\n",
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",
+    "- \"path\" within the \"target\" is only a filename, it will ignore any 
path specified on the file.\n",
+    "- The data generator simulates time when you specify a start time in the 
\"time_type\" property and a duration in the \"time\" property.\n",
+    "- \"concurrency\" indicates the maximum number of entities used 
concurrently to generate events. Each entity is a separate state machine that 
simulates things like user sessions, IoT devices, or other concurrent sources 
of event data. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "811ff58f-75af-4092-a08d-5e07a51592ff",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import datetime, timedelta\n",
+    "import json\n",
+    "\n",
+    "# determine start time, in this example we are starting one hour ago \n",
+    "startDateTime = (datetime.now() - timedelta(hours = 
1)).strftime('%Y-%m-%dT%H:%M:%S.001')\n",
+    "print(f\"Starting to generate history at {startDateTime}.\")\n",
+    "\n",
+    "job_name=\"gen_clickstream1\"\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "# this request if generating a data file at on the datagen server\n",
+    "datagen_request = {\n",
+    "    \"name\": job_name,\n",
+    "    \"target\": { \"type\": \"file\", \"path\":\"clicks.json\"},\n",
+    "    \"config_file\": \"clickstream/clickstream.json\", \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":100,\n",
+    "    \"time_type\": startDateTime\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d407d1d9-3f01-4128-a014-6a5f371c25a5",
+   "metadata": {},
+   "source": [
+    "### Display jobs\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3de698c5-bcf4-40c7-b295-728fb54d1f0a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\").json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "972ebed0-34a1-4ad2-909d-69b8b27c3046",
+   "metadata": {},
+   "source": [
+    "### Get status of a job\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "debce4f8-9c16-476c-9593-21ec984985d2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/status/{job_name}\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ef818d78-6aa6-4d38-8a43-83416aede96f",
+   "metadata": {},
+   "source": [
+    "### Stop a job\n",
+    "Use the /stop/\\<job_name> API to stop a job."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7631b8b8-d3d6-4803-9162-587f440d2ef2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.post(f\"/stop/{job_name}\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0a8dc7d3-64e5-41e3-8c28-c5f19c0536f5",
+   "metadata": {},
+   "source": [
+    "### List files created on datagen server\n",
+    "Use the /files API to list files available on the server."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "06ee36bd-2d2b-4904-9987-10636cf52aac",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/files\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "83ef9edb-98e2-45b4-88e8-578703faedc1",
+   "metadata": {},
+   "source": [
+    "### Batch Loading of Generated Files\n",
+    "Use a [Druid HTTP input 
source](https://druid.apache.org/docs/latest/ingestion/native-batch-input-sources.html#http-input-source)
 in the [EXTERN 
function](https://druid.apache.org/docs/latest/multi-stage-query/reference.html#extern-function)
 of a [SQL Based 
ingestion](https://druid.apache.org/docs/latest/multi-stage-query/index.html) 
to load generated files.\n",
+    "The files can be accessed by name using the 
`http://datagen:9999/file/<name of the file>` or if ingesting into a Druid 
instance outside of docker, but still running locally, then use 
`http://localhost:9999/file/<name of the file>`.\n",
+    "The following example assumes that both Druid and the data generator 
server are running in docker compose."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0d72b015-f8ec-4713-b6f2-fe7a15afff59",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "sql = '''\n",
+    "REPLACE INTO \"clicks\" OVERWRITE ALL\n",
+    "WITH \"ext\" AS (SELECT *\n",
+    "FROM TABLE(\n",
+    "  EXTERN(\n",
+    "    
'{\"type\":\"http\",\"uris\":[\"http://datagen:9999/file/clicks.json\"]}',\n",
+    "    '{\"type\":\"json\"}'\n",
+    "  )\n",
+    ") EXTEND (\"time\" VARCHAR, \"user_id\" VARCHAR, \"event_type\" VARCHAR, 
\"client_ip\" VARCHAR, \"client_device\" VARCHAR, \"client_lang\" VARCHAR, 
\"client_country\" VARCHAR, \"referrer\" VARCHAR, \"keyword\" VARCHAR, 
\"product\" VARCHAR))\n",
+    "SELECT\n",
+    "  TIME_PARSE(\"time\") AS \"__time\",\n",
+    "  \"user_id\",\n",
+    "  \"event_type\",\n",
+    "  \"client_ip\",\n",
+    "  \"client_device\",\n",
+    "  \"client_lang\",\n",
+    "  \"client_country\",\n",
+    "  \"referrer\",\n",
+    "  \"keyword\",\n",
+    "  \"product\"\n",
+    "FROM \"ext\"\n",
+    "PARTITIONED BY DAY\n",
+    "'''\n",
+    "druid.sql.run_task(sql)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b0997b38-02c2-483e-bd15-439c4bf0097a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "druid.display.sql('''\n",
+    "SELECT  event_type, \n",
+    "        count( DISTINCT \"user_id\") users, \n",
+    "        count( DISTINCT \"client_ip\") ips, \n",
+    "        count( DISTINCT \"client_ip\") - count( DISTINCT \"user_id\") 
ips_minus_users\n",
+    "FROM \"clicks\"\n",
+    "GROUP BY 1\n",
+    "HAVING count( DISTINCT \"user_id\") - count( DISTINCT \"client_ip\") < 
0\n",
+    "ORDER BY 4 DESC\n",
+    "''')\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "66ec013f-28e4-4d5a-94a6-06e0ed537b4e",
+   "metadata": {},
+   "source": [
+    "## Generating custom data\n",
+    "\n",
+    "You can fine the full set of configuration option in the [data generator 
project's 
readme](https://github.com/implydata/druid-datagenerator#data-generator-configuration).\n",
+    "\n",
+    "In this section we use a simple custom configuration as an example to 
generate some data."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d6451310-b7dd-4b39-a23b-7b735b152d6c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "gen_config = {\n",
+    "  \"emitters\": [\n",
+    "    {\n",
+    "      \"name\": \"simple_record\",\n",
+    "      \"dimensions\": [\n",
+    "        {\n",
+    "          \"type\": \"string\",\n",
+    "          \"name\": \"random_string_column\",\n",
+    "          \"length_distribution\": {\n",
+    "            \"type\": \"constant\",\n",
+    "            \"value\": 13\n",
+    "          },\n",
+    "          \"cardinality\": 0,\n",
+    "          \"chars\": \"#.abcdefghijklmnopqrstuvwxyz\"\n",
+    "        },\n",
+    "        {\n",
+    "          \"type\": \"int\",\n",
+    "          \"name\": \"distributed_number\",\n",
+    "          \"distribution\": {\n",
+    "            \"type\": \"uniform\",\n",
+    "            \"min\": 0,\n",
+    "            \"max\": 1000\n",
+    "          },\n",
+    "          \"cardinality\": 10,\n",
+    "          \"cardinality_distribution\": {\n",
+    "            \"type\": \"exponential\",\n",
+    "            \"mean\": 5\n",
+    "          }\n",
+    "        }\n",
+    "      ]\n",
+    "    }\n",
+    "  ],\n",
+    "  \"interarrival\": {\n",
+    "    \"type\": \"constant\",\n",
+    "    \"value\": 1\n",
+    "  },\n",
+    "  \"states\": [\n",
+    "    {\n",
+    "      \"name\": \"state_1\",\n",
+    "      \"emitter\": \"simple_record\",\n",
+    "      \"delay\": {\n",
+    "        \"type\": \"constant\",\n",
+    "        \"value\": 1\n",
+    "      },\n",
+    "      \"transitions\": [\n",
+    "        {\n",
+    "          \"next\": \"state_1\",\n",
+    "          \"probability\": 1.0\n",
+    "        }\n",
+    "      ]\n",
+    "    }\n",
+    "  ]\n",
+    "}\n",
+    "\n",
+    "target = { \"type\":\"file\", \"path\":\"sample_data.json\"}"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "89a22645-aea5-4c15-b81a-959b27df731f",
+   "metadata": {},
+   "source": [
+    "Now, instead of using a config_file, we use the config attribute of the 
request to use our new custom data generator."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "e5e5c535-3474-42b4-9772-14279e712f3d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# generate 1 hour of simulated time using custom configuration\n",
+    "datagen_request = {\n",
+    "    \"name\": \"sample_custom\",\n",
+    "    \"target\": target,\n",
+    "    \"config\": gen_config, \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":10,\n",
+    "    \"time_type\": \"SIM\"\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "952386f7-8181-4325-972b-5f30dc12cf21",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "470b3a2a-4fd9-45a2-9221-497d906f62a9",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "\n",
+    "display( datagen.get(f\"/file/sample_data.json\").content[:1024])"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "77bff054-0f16-4fd5-8ade-2d44b30d0cf2",
+   "metadata": {},
+   "source": [
+    "## Streaming generated data\n",
+    "\n",
+    "The data generator works exactly the same whether it is writing data to a 
file or publishing messages into a stream. You  only need to change the target 
configuration.\n",
+    "\n",
+    "To use the Kafka container running on Docker Compose, use the host name 
`kafka:9092`. This piece of code uses the KAFKA_HOST environment variable from 
Docker Compose to specify the Kafka host. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9959b7c3-6223-479d-b0c2-115a1c555090",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "if (os.environ['KAFKA_HOST'] == None):\n",
+    "    kafka_host=f\"kafka:9092\"\n",
+    "else:\n",
+    "    kafka_host=f\"{os.environ['KAFKA_HOST']}:9092\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "497abc18-6538-4536-a17f-fe10c4367611",
+   "metadata": {},
+   "source": [
+    "The simplest `target` object for kafka (and similarly confluent) is:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "686a74ab-e2dd-458e-9e93-10291064e9db",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "target = {\n",
+    "    \"type\":\"kafka\",\n",
+    "    \"endpoint\": kafka_host,\n",
+    "    \"topic\": \"custom_data\"\n",
+    "}\n",
+    "\n",
+    "# Generate 1 hour of simulated time using custom configuration\n",
+    "datagen_request = {\n",
+    "    \"name\": \"sample_custom\",\n",
+    "    \"target\": target,\n",
+    "    \"config\": gen_config, \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":10,\n",
+    "    \"time_type\": \"SIM\"\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ec17d0c7-a3ab-4f37-bbf0-cc02bff44cf1",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "84d7b706-9040-4a69-a956-1b1bbb037c32",
+   "metadata": {},
+   "source": [
+    "### Ingesting data from a stream \n",

Review Comment:
   ```suggestion
       "### Ingest data from a stream \n",
   ```



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+    "The default docker compose deployment includes a data generation service 
created from the published docker image `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available `config_file` values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes it is useful to be able to 
select the start time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",
+    "- \"path\" within the \"target\" is only a filename, it will ignore any 
path specified on the file.\n",
+    "- The data generator simulates time when you specify a start time in the 
\"time_type\" property and a duration in the \"time\" property.\n",
+    "- \"concurrency\" indicates the maximum number of entities used 
concurrently to generate events. Each entity is a separate state machine that 
simulates things like user sessions, IoT devices, or other concurrent sources 
of event data. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "811ff58f-75af-4092-a08d-5e07a51592ff",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import datetime, timedelta\n",
+    "import json\n",
+    "\n",
+    "# determine start time, in this example we are starting one hour ago \n",
+    "startDateTime = (datetime.now() - timedelta(hours = 
1)).strftime('%Y-%m-%dT%H:%M:%S.001')\n",
+    "print(f\"Starting to generate history at {startDateTime}.\")\n",
+    "\n",
+    "job_name=\"gen_clickstream1\"\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "# this request if generating a data file at on the datagen server\n",
+    "datagen_request = {\n",
+    "    \"name\": job_name,\n",
+    "    \"target\": { \"type\": \"file\", \"path\":\"clicks.json\"},\n",
+    "    \"config_file\": \"clickstream/clickstream.json\", \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":100,\n",
+    "    \"time_type\": startDateTime\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d407d1d9-3f01-4128-a014-6a5f371c25a5",
+   "metadata": {},
+   "source": [
+    "### Display jobs\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3de698c5-bcf4-40c7-b295-728fb54d1f0a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\").json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "972ebed0-34a1-4ad2-909d-69b8b27c3046",
+   "metadata": {},
+   "source": [
+    "### Get status of a job\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "debce4f8-9c16-476c-9593-21ec984985d2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/status/{job_name}\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ef818d78-6aa6-4d38-8a43-83416aede96f",
+   "metadata": {},
+   "source": [
+    "### Stop a job\n",
+    "Use the /stop/\\<job_name> API to stop a job."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7631b8b8-d3d6-4803-9162-587f440d2ef2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.post(f\"/stop/{job_name}\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0a8dc7d3-64e5-41e3-8c28-c5f19c0536f5",
+   "metadata": {},
+   "source": [
+    "### List files created on datagen server\n",
+    "Use the /files API to list files available on the server."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "06ee36bd-2d2b-4904-9987-10636cf52aac",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/files\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "83ef9edb-98e2-45b4-88e8-578703faedc1",
+   "metadata": {},
+   "source": [
+    "### Batch Loading of Generated Files\n",
+    "Use a [Druid HTTP input 
source](https://druid.apache.org/docs/latest/ingestion/native-batch-input-sources.html#http-input-source)
 in the [EXTERN 
function](https://druid.apache.org/docs/latest/multi-stage-query/reference.html#extern-function)
 of a [SQL Based 
ingestion](https://druid.apache.org/docs/latest/multi-stage-query/index.html) 
to load generated files.\n",
+    "The files can be accessed by name using the 
`http://datagen:9999/file/<name of the file>` or if ingesting into a Druid 
instance outside of docker, but still running locally, then use 
`http://localhost:9999/file/<name of the file>`.\n",
+    "The following example assumes that both Druid and the data generator 
server are running in docker compose."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0d72b015-f8ec-4713-b6f2-fe7a15afff59",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "sql = '''\n",
+    "REPLACE INTO \"clicks\" OVERWRITE ALL\n",
+    "WITH \"ext\" AS (SELECT *\n",
+    "FROM TABLE(\n",
+    "  EXTERN(\n",
+    "    
'{\"type\":\"http\",\"uris\":[\"http://datagen:9999/file/clicks.json\"]}',\n",
+    "    '{\"type\":\"json\"}'\n",
+    "  )\n",
+    ") EXTEND (\"time\" VARCHAR, \"user_id\" VARCHAR, \"event_type\" VARCHAR, 
\"client_ip\" VARCHAR, \"client_device\" VARCHAR, \"client_lang\" VARCHAR, 
\"client_country\" VARCHAR, \"referrer\" VARCHAR, \"keyword\" VARCHAR, 
\"product\" VARCHAR))\n",
+    "SELECT\n",
+    "  TIME_PARSE(\"time\") AS \"__time\",\n",
+    "  \"user_id\",\n",
+    "  \"event_type\",\n",
+    "  \"client_ip\",\n",
+    "  \"client_device\",\n",
+    "  \"client_lang\",\n",
+    "  \"client_country\",\n",
+    "  \"referrer\",\n",
+    "  \"keyword\",\n",
+    "  \"product\"\n",
+    "FROM \"ext\"\n",
+    "PARTITIONED BY DAY\n",
+    "'''\n",
+    "druid.sql.run_task(sql)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b0997b38-02c2-483e-bd15-439c4bf0097a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "druid.display.sql('''\n",
+    "SELECT  event_type, \n",
+    "        count( DISTINCT \"user_id\") users, \n",
+    "        count( DISTINCT \"client_ip\") ips, \n",
+    "        count( DISTINCT \"client_ip\") - count( DISTINCT \"user_id\") 
ips_minus_users\n",
+    "FROM \"clicks\"\n",
+    "GROUP BY 1\n",
+    "HAVING count( DISTINCT \"user_id\") - count( DISTINCT \"client_ip\") < 
0\n",
+    "ORDER BY 4 DESC\n",
+    "''')\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "66ec013f-28e4-4d5a-94a6-06e0ed537b4e",
+   "metadata": {},
+   "source": [
+    "## Generating custom data\n",
+    "\n",
+    "You can fine the full set of configuration option in the [data generator 
project's 
readme](https://github.com/implydata/druid-datagenerator#data-generator-configuration).\n",
+    "\n",
+    "In this section we use a simple custom configuration as an example to 
generate some data."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d6451310-b7dd-4b39-a23b-7b735b152d6c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "gen_config = {\n",
+    "  \"emitters\": [\n",
+    "    {\n",
+    "      \"name\": \"simple_record\",\n",
+    "      \"dimensions\": [\n",
+    "        {\n",
+    "          \"type\": \"string\",\n",
+    "          \"name\": \"random_string_column\",\n",
+    "          \"length_distribution\": {\n",
+    "            \"type\": \"constant\",\n",
+    "            \"value\": 13\n",
+    "          },\n",
+    "          \"cardinality\": 0,\n",
+    "          \"chars\": \"#.abcdefghijklmnopqrstuvwxyz\"\n",
+    "        },\n",
+    "        {\n",
+    "          \"type\": \"int\",\n",
+    "          \"name\": \"distributed_number\",\n",
+    "          \"distribution\": {\n",
+    "            \"type\": \"uniform\",\n",
+    "            \"min\": 0,\n",
+    "            \"max\": 1000\n",
+    "          },\n",
+    "          \"cardinality\": 10,\n",
+    "          \"cardinality_distribution\": {\n",
+    "            \"type\": \"exponential\",\n",
+    "            \"mean\": 5\n",
+    "          }\n",
+    "        }\n",
+    "      ]\n",
+    "    }\n",
+    "  ],\n",
+    "  \"interarrival\": {\n",
+    "    \"type\": \"constant\",\n",
+    "    \"value\": 1\n",
+    "  },\n",
+    "  \"states\": [\n",
+    "    {\n",
+    "      \"name\": \"state_1\",\n",
+    "      \"emitter\": \"simple_record\",\n",
+    "      \"delay\": {\n",
+    "        \"type\": \"constant\",\n",
+    "        \"value\": 1\n",
+    "      },\n",
+    "      \"transitions\": [\n",
+    "        {\n",
+    "          \"next\": \"state_1\",\n",
+    "          \"probability\": 1.0\n",
+    "        }\n",
+    "      ]\n",
+    "    }\n",
+    "  ]\n",
+    "}\n",
+    "\n",
+    "target = { \"type\":\"file\", \"path\":\"sample_data.json\"}"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "89a22645-aea5-4c15-b81a-959b27df731f",
+   "metadata": {},
+   "source": [
+    "Now, instead of using a config_file, we use the config attribute of the 
request to use our new custom data generator."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "e5e5c535-3474-42b4-9772-14279e712f3d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# generate 1 hour of simulated time using custom configuration\n",
+    "datagen_request = {\n",
+    "    \"name\": \"sample_custom\",\n",
+    "    \"target\": target,\n",
+    "    \"config\": gen_config, \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":10,\n",
+    "    \"time_type\": \"SIM\"\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "952386f7-8181-4325-972b-5f30dc12cf21",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "470b3a2a-4fd9-45a2-9221-497d906f62a9",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "\n",
+    "display( datagen.get(f\"/file/sample_data.json\").content[:1024])"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "77bff054-0f16-4fd5-8ade-2d44b30d0cf2",
+   "metadata": {},
+   "source": [
+    "## Streaming generated data\n",
+    "\n",
+    "The data generator works exactly the same whether it is outputing data to 
a file or publishing messages into a stream, all you need to change is the 
target configuration.\n",
+    "\n",
+    "To use the kafka container running on the docker compose set use the host 
name `kafka:9092`. This piece of code uses the KAFKA_HOST variable specified 
when bringing up the cluster to designate the appropriate host. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9959b7c3-6223-479d-b0c2-115a1c555090",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "if (os.environ['KAFKA_HOST'] == None):\n",
+    "    kafka_host=f\"kafka:9092\"\n",
+    "else:\n",
+    "    kafka_host=f\"{os.environ['KAFKA_HOST']}:9092\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "497abc18-6538-4536-a17f-fe10c4367611",
+   "metadata": {},
+   "source": [
+    "The simplest `target` object for kafka (and similarly confluent) is:"

Review Comment:
   If these should be lowercase because they're property values, include them 
in code font, but I think in this case the capital letter reference makes sense.



##########
examples/quickstart/jupyter-notebooks/notebooks/01-introduction/02-datagen-intro.ipynb:
##########
@@ -0,0 +1,540 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "9e07b3f5-d919-4179-91a1-0f6b66c42757",
+   "metadata": {},
+   "source": [
+    "# Data Generator Server\n",
+ "The default Docker Compose deployment includes a data generation service 
created from the published Docker image at `imply/datagen:latest`. \n",
+    "This image is built by the project 
https://github.com/implydata/druid-datagenerator. \n",
+    "\n",
+    "To interact with the data generation service, you can use the rest client 
provided in the druidapi python package."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f84766c7-c6a5-4496-91a3-abdb8ddd2375",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import druidapi\n",
+    "import os\n",
+    "\n",
+    "# Datagen client \n",
+    "datagen = druidapi.rest.DruidRestClient(\"http://datagen:9999\";)\n",
+    "\n",
+    "if (os.environ['DRUID_HOST'] == None):\n",
+    "    druid_host=f\"http://router:8888\"\n";,
+    "else:\n",
+    "    druid_host=f\"http://{os.environ['DRUID_HOST']}:8888\"\n",
+    "\n",
+    "# Druid client\n",
+    "druid = druidapi.jupyter_client(druid_host)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c54af617-0998-4010-90c3-9b5a38a09a5f",
+   "metadata": {},
+   "source": [
+    "### List available configurations\n",
+    "Use /list API to get the data generator's available configuration values 
with pre-defined data generator schemas."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "1ba6a80a-c49b-4abf-943b-9dad82f2ae13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/list\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ae88a3b7-60da-405d-bcf4-fb4affcfe973",
+   "metadata": {},
+   "source": [
+    "### Generate a data file for back filling history\n",
+    "When generating a file for backfill purposes, you can select the start 
time and the duration of the simulation.\n",
+    "This example shows how to do that:\n",
+    "- \"target\" specifies \"type\":\"file\" which generates a data file.\n",
+    "- \"path\" within the \"target\" is only a filename, it will ignore any 
path specified on the file.\n",
+    "- The data generator simulates time when you specify a start time in the 
\"time_type\" property and a duration in the \"time\" property.\n",
+    "- \"concurrency\" indicates the maximum number of entities used 
concurrently to generate events. Each entity is a separate state machine that 
simulates things like user sessions, IoT devices, or other concurrent sources 
of event data. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "811ff58f-75af-4092-a08d-5e07a51592ff",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from datetime import datetime, timedelta\n",
+    "import json\n",
+    "\n",
+    "# determine start time, in this example we are starting one hour ago \n",
+    "startDateTime = (datetime.now() - timedelta(hours = 
1)).strftime('%Y-%m-%dT%H:%M:%S.001')\n",
+    "print(f\"Starting to generate history at {startDateTime}.\")\n",
+    "\n",
+    "job_name=\"gen_clickstream1\"\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "# this request if generating a data file at on the datagen server\n",
+    "datagen_request = {\n",
+    "    \"name\": job_name,\n",
+    "    \"target\": { \"type\": \"file\", \"path\":\"clicks.json\"},\n",
+    "    \"config_file\": \"clickstream/clickstream.json\", \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":100,\n",
+    "    \"time_type\": startDateTime\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d407d1d9-3f01-4128-a014-6a5f371c25a5",
+   "metadata": {},
+   "source": [
+    "### Display jobs\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3de698c5-bcf4-40c7-b295-728fb54d1f0a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\").json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "972ebed0-34a1-4ad2-909d-69b8b27c3046",
+   "metadata": {},
+   "source": [
+    "### Get status of a job\n",
+    "Use the /jobs API to get the current jobs and their status."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "debce4f8-9c16-476c-9593-21ec984985d2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/status/{job_name}\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ef818d78-6aa6-4d38-8a43-83416aede96f",
+   "metadata": {},
+   "source": [
+    "### Stop a job\n",
+    "Use the /stop/\\<job_name> API to stop a job."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7631b8b8-d3d6-4803-9162-587f440d2ef2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.post(f\"/stop/{job_name}\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0a8dc7d3-64e5-41e3-8c28-c5f19c0536f5",
+   "metadata": {},
+   "source": [
+    "### List files created on datagen server\n",
+    "Use the /files API to list files available on the server."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "06ee36bd-2d2b-4904-9987-10636cf52aac",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/files\", '').json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "83ef9edb-98e2-45b4-88e8-578703faedc1",
+   "metadata": {},
+   "source": [
+    "### Batch Loading of Generated Files\n",
+    "Use a [Druid HTTP input 
source](https://druid.apache.org/docs/latest/ingestion/native-batch-input-sources.html#http-input-source)
 in the [EXTERN 
function](https://druid.apache.org/docs/latest/multi-stage-query/reference.html#extern-function)
 of a [SQL Based 
ingestion](https://druid.apache.org/docs/latest/multi-stage-query/index.html) 
to load generated files.\n",
+    "The files can be accessed by name using the 
`http://datagen:9999/file/<name of the file>` or if ingesting into a Druid 
instance outside of docker, but still running locally, then use 
`http://localhost:9999/file/<name of the file>`.\n",
+    "The following example assumes that both Druid and the data generator 
server are running in docker compose."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0d72b015-f8ec-4713-b6f2-fe7a15afff59",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "sql = '''\n",
+    "REPLACE INTO \"clicks\" OVERWRITE ALL\n",
+    "WITH \"ext\" AS (SELECT *\n",
+    "FROM TABLE(\n",
+    "  EXTERN(\n",
+    "    
'{\"type\":\"http\",\"uris\":[\"http://datagen:9999/file/clicks.json\"]}',\n",
+    "    '{\"type\":\"json\"}'\n",
+    "  )\n",
+    ") EXTEND (\"time\" VARCHAR, \"user_id\" VARCHAR, \"event_type\" VARCHAR, 
\"client_ip\" VARCHAR, \"client_device\" VARCHAR, \"client_lang\" VARCHAR, 
\"client_country\" VARCHAR, \"referrer\" VARCHAR, \"keyword\" VARCHAR, 
\"product\" VARCHAR))\n",
+    "SELECT\n",
+    "  TIME_PARSE(\"time\") AS \"__time\",\n",
+    "  \"user_id\",\n",
+    "  \"event_type\",\n",
+    "  \"client_ip\",\n",
+    "  \"client_device\",\n",
+    "  \"client_lang\",\n",
+    "  \"client_country\",\n",
+    "  \"referrer\",\n",
+    "  \"keyword\",\n",
+    "  \"product\"\n",
+    "FROM \"ext\"\n",
+    "PARTITIONED BY DAY\n",
+    "'''\n",
+    "druid.sql.run_task(sql)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b0997b38-02c2-483e-bd15-439c4bf0097a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "druid.display.sql('''\n",
+    "SELECT  event_type, \n",
+    "        count( DISTINCT \"user_id\") users, \n",
+    "        count( DISTINCT \"client_ip\") ips, \n",
+    "        count( DISTINCT \"client_ip\") - count( DISTINCT \"user_id\") 
ips_minus_users\n",
+    "FROM \"clicks\"\n",
+    "GROUP BY 1\n",
+    "HAVING count( DISTINCT \"user_id\") - count( DISTINCT \"client_ip\") < 
0\n",
+    "ORDER BY 4 DESC\n",
+    "''')\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "66ec013f-28e4-4d5a-94a6-06e0ed537b4e",
+   "metadata": {},
+   "source": [
+    "## Generating custom data\n",
+    "\n",
+    "You can fine the full set of configuration option in the [data generator 
project's 
readme](https://github.com/implydata/druid-datagenerator#data-generator-configuration).\n",
+    "\n",
+    "In this section we use a simple custom configuration as an example to 
generate some data."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d6451310-b7dd-4b39-a23b-7b735b152d6c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "gen_config = {\n",
+    "  \"emitters\": [\n",
+    "    {\n",
+    "      \"name\": \"simple_record\",\n",
+    "      \"dimensions\": [\n",
+    "        {\n",
+    "          \"type\": \"string\",\n",
+    "          \"name\": \"random_string_column\",\n",
+    "          \"length_distribution\": {\n",
+    "            \"type\": \"constant\",\n",
+    "            \"value\": 13\n",
+    "          },\n",
+    "          \"cardinality\": 0,\n",
+    "          \"chars\": \"#.abcdefghijklmnopqrstuvwxyz\"\n",
+    "        },\n",
+    "        {\n",
+    "          \"type\": \"int\",\n",
+    "          \"name\": \"distributed_number\",\n",
+    "          \"distribution\": {\n",
+    "            \"type\": \"uniform\",\n",
+    "            \"min\": 0,\n",
+    "            \"max\": 1000\n",
+    "          },\n",
+    "          \"cardinality\": 10,\n",
+    "          \"cardinality_distribution\": {\n",
+    "            \"type\": \"exponential\",\n",
+    "            \"mean\": 5\n",
+    "          }\n",
+    "        }\n",
+    "      ]\n",
+    "    }\n",
+    "  ],\n",
+    "  \"interarrival\": {\n",
+    "    \"type\": \"constant\",\n",
+    "    \"value\": 1\n",
+    "  },\n",
+    "  \"states\": [\n",
+    "    {\n",
+    "      \"name\": \"state_1\",\n",
+    "      \"emitter\": \"simple_record\",\n",
+    "      \"delay\": {\n",
+    "        \"type\": \"constant\",\n",
+    "        \"value\": 1\n",
+    "      },\n",
+    "      \"transitions\": [\n",
+    "        {\n",
+    "          \"next\": \"state_1\",\n",
+    "          \"probability\": 1.0\n",
+    "        }\n",
+    "      ]\n",
+    "    }\n",
+    "  ]\n",
+    "}\n",
+    "\n",
+    "target = { \"type\":\"file\", \"path\":\"sample_data.json\"}"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "89a22645-aea5-4c15-b81a-959b27df731f",
+   "metadata": {},
+   "source": [
+    "Now, instead of using a config_file, we use the config attribute of the 
request to use our new custom data generator."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "e5e5c535-3474-42b4-9772-14279e712f3d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# generate 1 hour of simulated time using custom configuration\n",
+    "datagen_request = {\n",
+    "    \"name\": \"sample_custom\",\n",
+    "    \"target\": target,\n",
+    "    \"config\": gen_config, \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":10,\n",
+    "    \"time_type\": \"SIM\"\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "952386f7-8181-4325-972b-5f30dc12cf21",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "470b3a2a-4fd9-45a2-9221-497d906f62a9",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "\n",
+    "display( datagen.get(f\"/file/sample_data.json\").content[:1024])"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "77bff054-0f16-4fd5-8ade-2d44b30d0cf2",
+   "metadata": {},
+   "source": [
+    "## Streaming generated data\n",
+    "\n",
+    "The data generator works exactly the same whether it is writing data to a 
file or publishing messages into a stream. You  only need to change the target 
configuration.\n",
+    "\n",
+    "To use the Kafka container running on Docker Compose, use the host name 
`kafka:9092`. This piece of code uses the KAFKA_HOST environment variable from 
Docker Compose to specify the Kafka host. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9959b7c3-6223-479d-b0c2-115a1c555090",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "if (os.environ['KAFKA_HOST'] == None):\n",
+    "    kafka_host=f\"kafka:9092\"\n",
+    "else:\n",
+    "    kafka_host=f\"{os.environ['KAFKA_HOST']}:9092\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "497abc18-6538-4536-a17f-fe10c4367611",
+   "metadata": {},
+   "source": [
+    "The simplest `target` object for kafka (and similarly confluent) is:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "686a74ab-e2dd-458e-9e93-10291064e9db",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "target = {\n",
+    "    \"type\":\"kafka\",\n",
+    "    \"endpoint\": kafka_host,\n",
+    "    \"topic\": \"custom_data\"\n",
+    "}\n",
+    "\n",
+    "# Generate 1 hour of simulated time using custom configuration\n",
+    "datagen_request = {\n",
+    "    \"name\": \"sample_custom\",\n",
+    "    \"target\": target,\n",
+    "    \"config\": gen_config, \n",
+    "    \"time\": \"1h\",\n",
+    "    \"concurrency\":10,\n",
+    "    \"time_type\": \"SIM\"\n",
+    "}\n",
+    "response = datagen.post(\"/start\", json.dumps(datagen_request), 
headers=headers, require_ok=False)\n",
+    "response.json()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ec17d0c7-a3ab-4f37-bbf0-cc02bff44cf1",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "display(datagen.get(f\"/jobs\", require_ok=False).json())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "84d7b706-9040-4a69-a956-1b1bbb037c32",
+   "metadata": {},
+   "source": [
+    "### Ingesting data from a stream \n",
+    "This example shows how to start a streaming ingestion supervisor in 
Apache Druid to consume your custom data:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "51912409-e4e7-48d1-b3a5-b269622b4e56",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "ingestion_spec ={\n",
+    "  \"type\": \"kafka\",\n",
+    "  \"spec\": {\n",
+    "    \"ioConfig\": {\n",
+    "      \"type\": \"kafka\",\n",
+    "      \"consumerProperties\": {\n",
+    "        \"bootstrap.servers\": \"kafka:9092\"\n",
+    "      },\n",
+    "      \"topic\": \"custom_data\",\n",
+    "      \"inputFormat\": {\n",
+    "        \"type\": \"json\"\n",
+    "      },\n",
+    "      \"useEarliestOffset\": True\n",
+    "    },\n",
+    "    \"tuningConfig\": {\n",
+    "      \"type\": \"kafka\",\n",
+    "      \"maxRowsInMemory\": 100000,\n",
+    "      \"resetOffsetAutomatically\": False\n",
+    "    },\n",
+    "    \"dataSchema\": {\n",
+    "      \"dataSource\": \"custom_data\",\n",
+    "      \"timestampSpec\": {\n",
+    "        \"column\": \"time\",\n",
+    "        \"format\": \"iso\"\n",
+    "      },\n",
+    "      \"dimensionsSpec\": {\n",
+    "        \"dimensions\": [\n",
+    "          \"random_string_column\",\n",
+    "          {\n",
+    "            \"type\": \"long\",\n",
+    "            \"name\": \"distributed_number\"\n",
+    "          }\n",
+    "        ]\n",
+    "      },\n",
+    "      \"granularitySpec\": {\n",
+    "        \"queryGranularity\": \"none\",\n",
+    "        \"rollup\": False,\n",
+    "        \"segmentGranularity\": \"hour\"\n",
+    "      }\n",
+    "    }\n",
+    "  }\n",
+    "}\n",
+    "\n",
+    "headers = {\n",
+    "  'Content-Type': 'application/json'\n",
+    "}\n",
+    "\n",
+    "druid.rest.post(\"/druid/indexer/v1/supervisor\", 
json.dumps(ingestion_spec), headers=headers)"
+   ]
+  },
+  {
+   "cell_type": "code",

Review Comment:
   Include a text cell before the SELECT query to describe what the query does. 
Do you need to note that the query won't work until the ingestion is running 
and data is present in the datasource?



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