wu-sheng commented on a change in pull request #995: Collector table
description for develop guide.
URL:
https://github.com/apache/incubator-skywalking/pull/995#discussion_r178218202
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File path: docs/en/Collector-Table-Description.md
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+# Collector Table Description
+This document describes the usage of tables and their columns, based on
elasticsearch storage implementation.
+
+## Metric table time bucket
+### Date format
+- second: `yyyyMMddHHmmss`
+- minute: `yyyyMMddHHmm`
+- hour: `yyyyMMddHH`
+- day: `yyyyMMdd`
+- month: `yyyyMM`
+
+## Tables of Register related
+### Application
+- Table name: application
+- Get or create a database record by "application_code".
+
+Column Name | Short Name | Data Type | Description
+----------- | ---------- | --------- | ---------
+_id | _id | Keyword | primary key, es speciality, the value same as
application_id
+application_code | c1 | Keyword | The application name, see `agent.config`
+application_id | c2 | Integer | Auto increment, is a signed integer
+layer | c3 | Integer | Register by client or server side
+is_address | c4 | Integer | Is a boolean data. True(1), False(0)
+address_id | c5 | Integer | A foreign key reference by network_address table
+
+- Column `is_address`
+ - `false`. A real application, which has a custom `application_code`. At the
same time, the `address_id` column value must to be 0.
+ - `true`. A conjunction application based on IP address. `address_id` is
registered in `network_address` table.
+
+### Instance
+- Table name: instance
+- Create a instance by `application_id` and `agent_uuid`
+
+Column Name | Short Name | Data Type | Description
+----------- | ---------- | --------- | ---------
+_id | _id | Keyword | primary key, es speciality, the value same as instance_id
+application_id | c1 | Integer | Owner application id
+application_code | c2 | Text | Owner application code
+agent_uuid | c3 | Keyword | Uniquely identifies each server monitored by agent
+register_time | c4 | Long | First register time
+instance_id | c5 | Integer | Auto increment, is a unsigned integer
+heartbeat_time | c6 | Long | Represent server is alive
+os_info | c7 | Text | A Json data.
+is_address | c8 | Integer | Is a boolean data. True(1), False(0)
+address_id | c9 | Integer | A foreign key reference by network_address table
+
+- Column `os_info`
+ - For example: {"osName":"MacOS
X","hostName":peng-yongsheng","processId":1000,"ipv4s":["10.0.0.1","10.0.0.2"]}
+- Column `heartbeat_time`
+ - Updated by agent heart beat [1]
+ - Updated by JVM metric data [2]
+ - Updated by trace segment data. [3]
+ - Priority: [1] > [2] > [3]
+
+### NetworkAddress
+- Table name: network_address
+- Create a network address record by "network_address" and "span_layer".
+
+Column Name | Short Name | Data Type | Description
+----------- | ---------- | --------- | ---------
+_id | _id | Keyword | primary key, es speciality, the value same as address_id
+address_id | c1 | Integer | Auto increment, is a signed integer
+network_address | c2 | Keyword | Host name or IP address
+span_layer | c3 | Integer | Register by client or server side
+server_type | c4 | Integer | Such as component id, used for topology.
+
+### ServiceName
+- Table name: service_name
+- Create a service record by "service_name_keyword", "application_id" and
"src_span_type".
+
+Column Name | Short Name | Data Type | Description
+----------- | ---------- | --------- | ---------
+_id | _id | Keyword | primary key, es speciality, the value same as service_id
+service_id | c1 | Integer | Auto increment, is a signed integer
+service_name | c2 | Text | Operation name, used for fuzzy matching
+service_name_keyword | c3 | Keyword | Operation name, used for full matching
+application_id | c4 | Integer | Owner application id
+src_span_type | c5 | Integer | Register from client or server side based on
`src_span_type`
+
+- See `src_span_type` in [protocol
doc](Trace-Data-Protocol.md#network-address-register-service)
+
+## Table of Trace Metric related
+### ApplicationComponent
+- Table name: application_component_`TimeDimension`
+- TimeDimension contains minute, hour, day, month
+- It is primarily used for the view of node type in application topology.
+
+Column Name | Short Name | Data Type | Description
+----------- | ---------- | --------- | ---------
+_id | _id | Keyword | primary key, es speciality, `time_bucket`_`metric_id`
+metric_id | c1 | Keyword | `application_id`_`component_id`
+component_id | c2 | Integer | [Component
id](https://github.com/apache/incubator-skywalking/blob/master/apm-protocol/apm-network/src/main/java/org/apache/skywalking/apm/network/trace/component/ComponentsDefine.java)
Review comment:
The link is very dangerous for document. Please use related path as same as
other links in this document.
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