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The following commit(s) were added to refs/heads/asf-site by this push:
new 406949a MINOR: Backport of docs fixes to 28 (#359)
406949a is described below
commit 406949ab531865af4082ca7cc49b99ba60621a0d
Author: Josep Prat <josep.p...@aiven.io>
AuthorDate: Fri Jun 18 23:30:18 2021 +0200
MINOR: Backport of docs fixes to 28 (#359)
This PR backports https://github.com/apache/kafka/pull/10766/ to folder
28 as indicated in the same PR.
---
28/api.html | 50 +++++++-------
28/configuration.html | 28 ++++----
28/design.html | 29 ++++----
28/implementation.html | 176 ++++++++++++++++++++++++-------------------------
28/toc.html | 34 +++++-----
5 files changed, 159 insertions(+), 158 deletions(-)
diff --git a/28/api.html b/28/api.html
index 94d5f3e..7b74d04 100644
--- a/28/api.html
+++ b/28/api.html
@@ -35,11 +35,11 @@
<p>
To use the producer, you can use the following maven dependency:
- <pre class="line-numbers"><code class="language-xml">
<dependency>
- <groupId>org.apache.kafka</groupId>
- <artifactId>kafka-clients</artifactId>
- <version>{{fullDotVersion}}</version>
- </dependency></code></pre>
+ <pre class="line-numbers"><code class="language-xml"><dependency>
+ <groupId>org.apache.kafka</groupId>
+ <artifactId>kafka-clients</artifactId>
+ <version>{{fullDotVersion}}</version>
+</dependency></code></pre>
<h3 class="anchor-heading"><a id="consumerapi"
class="anchor-link"></a><a href="#consumerapi">2.2 Consumer API</a></h3>
@@ -49,11 +49,11 @@
<a
href="/{{version}}/javadoc/index.html?org/apache/kafka/clients/consumer/KafkaConsumer.html"
title="Kafka {{dotVersion}} Javadoc">javadocs</a>.
<p>
To use the consumer, you can use the following maven dependency:
- <pre class="line-numbers"><code class="language-xml">
<dependency>
- <groupId>org.apache.kafka</groupId>
- <artifactId>kafka-clients</artifactId>
- <version>{{fullDotVersion}}</version>
- </dependency></code></pre>
+ <pre class="line-numbers"><code class="language-xml"><dependency>
+ <groupId>org.apache.kafka</groupId>
+ <artifactId>kafka-clients</artifactId>
+ <version>{{fullDotVersion}}</version>
+</dependency></code></pre>
<h3 class="anchor-heading"><a id="streamsapi"
class="anchor-link"></a><a href="#streamsapi">2.3 Streams API</a></h3>
@@ -66,22 +66,22 @@
<p>
To use Kafka Streams you can use the following maven dependency:
- <pre class="line-numbers"><code class="language-xml">
<dependency>
- <groupId>org.apache.kafka</groupId>
- <artifactId>kafka-streams</artifactId>
- <version>{{fullDotVersion}}</version>
- </dependency></code></pre>
+ <pre class="line-numbers"><code class="language-xml"><dependency>
+ <groupId>org.apache.kafka</groupId>
+ <artifactId>kafka-streams</artifactId>
+ <version>{{fullDotVersion}}</version>
+</dependency></code></pre>
<p>
When using Scala you may optionally include the
<code>kafka-streams-scala</code> library. Additional documentation on using
the Kafka Streams DSL for Scala is available <a
href="/{{version}}/documentation/streams/developer-guide/dsl-api.html#scala-dsl">in
the developer guide</a>.
<p>
To use Kafka Streams DSL for Scala for Scala {{scalaVersion}} you can
use the following maven dependency:
- <pre class="line-numbers"><code class="language-xml">
<dependency>
- <groupId>org.apache.kafka</groupId>
-
<artifactId>kafka-streams-scala_{{scalaVersion}}</artifactId>
- <version>{{fullDotVersion}}</version>
- </dependency></code></pre>
+ <pre class="line-numbers"><code class="language-xml"><dependency>
+ <groupId>org.apache.kafka</groupId>
+
<artifactId>kafka-streams-scala_{{scalaVersion}}</artifactId>
+ <version>{{fullDotVersion}}</version>
+</dependency></code></pre>
<h3 class="anchor-heading"><a id="connectapi"
class="anchor-link"></a><a href="#connectapi">2.4 Connect API</a></h3>
@@ -97,11 +97,11 @@
The Admin API supports managing and inspecting topics, brokers, acls,
and other Kafka objects.
<p>
To use the Admin API, add the following Maven dependency:
- <pre class="line-numbers"><code class="language-xml">
<dependency>
- <groupId>org.apache.kafka</groupId>
- <artifactId>kafka-clients</artifactId>
- <version>{{fullDotVersion}}</version>
- </dependency></code></pre>
+ <pre class="line-numbers"><code class="language-xml"><dependency>
+ <groupId>org.apache.kafka</groupId>
+ <artifactId>kafka-clients</artifactId>
+ <version>{{fullDotVersion}}</version>
+</dependency></code></pre>
For more information about the Admin APIs, see the <a
href="/{{version}}/javadoc/index.html?org/apache/kafka/clients/admin/Admin.html"
title="Kafka {{dotVersion}} Javadoc">javadoc</a>.
<p>
diff --git a/28/configuration.html b/28/configuration.html
index 34340a9..0782c83 100644
--- a/28/configuration.html
+++ b/28/configuration.html
@@ -43,21 +43,21 @@
</ul>
To alter the current broker configs for broker id 0 (for example, the number
of log cleaner threads):
- <pre class="line-numbers"><code class="language-bash"> >
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers
--entity-name 0 --alter --add-config log.cleaner.threads=2</code></pre>
+ <pre class="line-numbers"><code class="language-bash">>
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers
--entity-name 0 --alter --add-config log.cleaner.threads=2</code></pre>
To describe the current dynamic broker configs for broker id 0:
- <pre class="line-numbers"><code class="language-bash"> >
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers
--entity-name 0 --describe</code></pre>
+ <pre class="line-numbers"><code class="language-bash">>
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers
--entity-name 0 --describe</code></pre>
To delete a config override and revert to the statically configured or
default value for broker id 0 (for example,
the number of log cleaner threads):
- <pre class="line-numbers"><code class="language-bash"> >
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers
--entity-name 0 --alter --delete-config log.cleaner.threads</code></pre>
+ <pre class="line-numbers"><code class="language-bash">>
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers
--entity-name 0 --alter --delete-config log.cleaner.threads</code></pre>
Some configs may be configured as a cluster-wide default to maintain
consistent values across the whole cluster. All brokers
in the cluster will process the cluster default update. For example, to
update log cleaner threads on all brokers:
- <pre class="line-numbers"><code class="language-bash"> >
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers
--entity-default --alter --add-config log.cleaner.threads=2</code></pre>
+ <pre class="line-numbers"><code class="language-bash">>
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers
--entity-default --alter --add-config log.cleaner.threads=2</code></pre>
To describe the currently configured dynamic cluster-wide default configs:
- <pre class="line-numbers"><code class="language-bash"> >
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers
--entity-default --describe</code></pre>
+ <pre class="line-numbers"><code class="language-bash">>
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers
--entity-default --describe</code></pre>
All configs that are configurable at cluster level may also be configured at
per-broker level (e.g. for testing).
If a config value is defined at different levels, the following order of
precedence is used:
@@ -89,7 +89,7 @@
encoder configs will not be persisted in ZooKeeper. For example, to store
SSL key password for listener <code>INTERNAL</code>
on broker 0:
- <pre class="line-numbers"><code class="language-bash"> >
bin/kafka-configs.sh --zookeeper localhost:2182 --zk-tls-config-file
zk_tls_config.properties --entity-type brokers --entity-name 0 --alter
--add-config
+ <pre class="line-numbers"><code class="language-bash">>
bin/kafka-configs.sh --zookeeper localhost:2182 --zk-tls-config-file
zk_tls_config.properties --entity-type brokers --entity-name 0 --alter
--add-config
'listener.name.internal.ssl.key.password=key-password,password.encoder.secret=secret,password.encoder.iterations=8192'</code></pre>
The configuration <code>listener.name.internal.ssl.key.password</code> will
be persisted in ZooKeeper in encrypted
@@ -162,7 +162,7 @@
In Kafka version 1.1.x, changes to
<code>unclean.leader.election.enable</code> take effect only when a new
controller is elected.
Controller re-election may be forced by running:
- <pre class="line-numbers"><code class="language-bash"> >
bin/zookeeper-shell.sh localhost
+ <pre class="line-numbers"><code class="language-bash">>
bin/zookeeper-shell.sh localhost
rmr /controller</code></pre>
<h5>Updating Log Cleaner Configs</h5>
@@ -220,18 +220,18 @@
<h3 class="anchor-heading"><a id="topicconfigs" class="anchor-link"></a><a
href="#topicconfigs">3.2 Topic-Level Configs</a></h3>
Configurations pertinent to topics have both a server default as well an
optional per-topic override. If no per-topic configuration is given the server
default is used. The override can be set at topic creation time by giving one
or more <code>--config</code> options. This example creates a topic named
<i>my-topic</i> with a custom max message size and flush rate:
- <pre class="line-numbers"><code class="language-bash"> >
bin/kafka-topics.sh --bootstrap-server localhost:9092 --create --topic my-topic
--partitions 1 \
- --replication-factor 1 --config max.message.bytes=64000 --config
flush.messages=1</code></pre>
+ <pre class="line-numbers"><code class="language-bash">>
bin/kafka-topics.sh --bootstrap-server localhost:9092 --create --topic my-topic
--partitions 1 \
+ --replication-factor 1 --config max.message.bytes=64000 --config
flush.messages=1</code></pre>
Overrides can also be changed or set later using the alter configs command.
This example updates the max message size for <i>my-topic</i>:
- <pre class="line-numbers"><code class="language-bash"> >
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type topics
--entity-name my-topic
- --alter --add-config max.message.bytes=128000</code></pre>
+ <pre class="line-numbers"><code class="language-bash">>
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type topics
--entity-name my-topic
+ --alter --add-config max.message.bytes=128000</code></pre>
To check overrides set on the topic you can do
- <pre class="line-numbers"><code class="language-bash"> >
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type topics
--entity-name my-topic --describe</code></pre>
+ <pre class="line-numbers"><code class="language-bash">>
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type topics
--entity-name my-topic --describe</code></pre>
To remove an override you can do
- <pre class="line-numbers"><code class="language-bash"> >
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type topics
--entity-name my-topic
- --alter --delete-config max.message.bytes</code></pre>
+ <pre class="line-numbers"><code class="language-bash">>
bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type topics
--entity-name my-topic
+ --alter --delete-config max.message.bytes</code></pre>
The following are the topic-level configurations. The server's default
configuration for this property is given under the Server Default Property
heading. A given server default config value only applies to a topic if it does
not have an explicit topic config override.
diff --git a/28/design.html b/28/design.html
index a1e438e..a6dee39 100644
--- a/28/design.html
+++ b/28/design.html
@@ -453,15 +453,15 @@
<p>
Let's discuss a concrete example of such a stream. Say we have a topic
containing user email addresses; every time a user updates their email address
we send a message to this topic using their user id as the
primary key. Now say we send the following messages over some time period
for a user with id 123, each message corresponding to a change in email address
(messages for other ids are omitted):
- <pre class="line-numbers"><code class="language-text"> 123 =>
b...@microsoft.com
- .
- .
- .
- 123 => b...@gatesfoundation.org
- .
- .
- .
- 123 => b...@gmail.com</code></pre>
+ <pre class="line-numbers"><code class="language-text">123 =>
b...@microsoft.com
+ .
+ .
+ .
+123 => b...@gatesfoundation.org
+ .
+ .
+ .
+123 => b...@gmail.com</code></pre>
Log compaction gives us a more granular retention mechanism so that we are
guaranteed to retain at least the last update for each primary key (e.g.
<code>b...@gmail.com</code>). By doing this we guarantee that the
log contains a full snapshot of the final value for every key not just
keys that changed recently. This means downstream consumers can restore their
own state off this topic without us having to retain a complete
log of all changes.
@@ -548,7 +548,7 @@
The log cleaner is enabled by default. This will start the pool of cleaner
threads.
To enable log cleaning on a particular topic, add the log-specific property
- <pre class="language-text"><code> log.cleanup.policy=compact</code></pre>
+ <pre class="language-text"><code>log.cleanup.policy=compact</code></pre>
The <code>log.cleanup.policy</code> property is a broker configuration
setting defined
in the broker's <code>server.properties</code> file; it affects all of the
topics
@@ -556,13 +556,13 @@
<a href="/documentation.html#brokerconfigs">here</a>.
The log cleaner can be configured to retain a minimum amount of the
uncompacted "head" of the log. This is enabled by setting the compaction time
lag.
- <pre class="language-text"><code>
log.cleaner.min.compaction.lag.ms</code></pre>
+ <pre
class="language-text"><code>log.cleaner.min.compaction.lag.ms</code></pre>
This can be used to prevent messages newer than a minimum message age from
being subject to compaction. If not set, all log segments are eligible for
compaction except for the last segment, i.e. the one currently
being written to. The active segment will not be compacted even if all of
its messages are older than the minimum compaction time lag.
The log cleaner can be configured to ensure a maximum delay after which
the uncompacted "head" of the log becomes eligible for log compaction.
- <pre class="language-text"><code>
log.cleaner.max.compaction.lag.ms</code></pre>
+ <pre
class="language-text"><code>log.cleaner.max.compaction.lag.ms</code></pre>
This can be used to prevent log with low produce rate from remaining
ineligible for compaction for an unbounded duration. If not set, logs that do
not exceed min.cleanable.dirty.ratio are not compacted.
Note that this compaction deadline is not a hard guarantee since it is
still subjected to the availability of log cleaner threads and the actual
compaction time.
@@ -575,11 +575,11 @@
<p>
Kafka cluster has the ability to enforce quotas on requests to control the
broker resources used by clients. Two types
of client quotas can be enforced by Kafka brokers for each group of
clients sharing a quota:
+ </p>
<ol>
<li>Network bandwidth quotas define byte-rate thresholds (since 0.9)</li>
<li>Request rate quotas define CPU utilization thresholds as a
percentage of network and I/O threads (since 0.11)</li>
</ol>
- </p>
<h4 class="anchor-heading">
<a class="anchor-link" id="design_quotasnecessary"
href="#design_quotasnecessary"></a>
@@ -610,6 +610,7 @@
</p>
<p>
The order of precedence for quota configuration is:
+ </p>
<ol>
<li>/config/users/<user>/clients/<client-id></li>
<li>/config/users/<user>/clients/<default></li>
@@ -620,7 +621,7 @@
<li>/config/clients/<client-id></li>
<li>/config/clients/<default></li>
</ol>
-
+ <p>
Broker properties (quota.producer.default, quota.consumer.default) can
also be used to set defaults of network bandwidth quotas for client-id groups.
These properties are being deprecated and will be removed in a later release.
Default quotas for client-id can be set in Zookeeper similar to the
other quota overrides and defaults.
</p>
diff --git a/28/implementation.html b/28/implementation.html
index 1476c2b..5d75ccb 100644
--- a/28/implementation.html
+++ b/28/implementation.html
@@ -32,29 +32,29 @@
<h4 class="anchor-heading"><a id="recordbatch" class="anchor-link"></a><a
href="#recordbatch">5.3.1 Record Batch</a></h4>
<p> The following is the on-disk format of a RecordBatch. </p>
- <p><pre class="line-numbers"><code class="language-java">
baseOffset: int64
- batchLength: int32
- partitionLeaderEpoch: int32
- magic: int8 (current magic value is 2)
- crc: int32
- attributes: int16
- bit 0~2:
- 0: no compression
- 1: gzip
- 2: snappy
- 3: lz4
- 4: zstd
- bit 3: timestampType
- bit 4: isTransactional (0 means not transactional)
- bit 5: isControlBatch (0 means not a control batch)
- bit 6~15: unused
- lastOffsetDelta: int32
- firstTimestamp: int64
- maxTimestamp: int64
- producerId: int64
- producerEpoch: int16
- baseSequence: int32
- records: [Record]</code></pre></p>
+ <pre class="line-numbers"><code class="language-text">baseOffset: int64
+batchLength: int32
+partitionLeaderEpoch: int32
+magic: int8 (current magic value is 2)
+crc: int32
+attributes: int16
+ bit 0~2:
+ 0: no compression
+ 1: gzip
+ 2: snappy
+ 3: lz4
+ 4: zstd
+ bit 3: timestampType
+ bit 4: isTransactional (0 means not transactional)
+ bit 5: isControlBatch (0 means not a control batch)
+ bit 6~15: unused
+lastOffsetDelta: int32
+firstTimestamp: int64
+maxTimestamp: int64
+producerId: int64
+producerEpoch: int16
+baseSequence: int32
+records: [Record]</code></pre>
<p> Note that when compression is enabled, the compressed record data is
serialized directly following the count of the number of records. </p>
<p>The CRC covers the data from the attributes to the end of the batch
(i.e. all the bytes that follow the CRC). It is located after the magic byte,
which
@@ -71,27 +71,27 @@
<h5 class="anchor-heading"><a id="controlbatch" class="anchor-link"></a><a
href="#controlbatch">5.3.1.1 Control Batches</a></h5>
<p>A control batch contains a single record called the control record.
Control records should not be passed on to applications. Instead, they are used
by consumers to filter out aborted transactional messages.</p>
<p> The key of a control record conforms to the following schema: </p>
- <p><pre class="line-numbers"><code class="language-java"> version:
int16 (current version is 0)
- type: int16 (0 indicates an abort marker, 1 indicates a
commit)</code></pre></p>
+ <pre class="line-numbers"><code class="language-text">version: int16
(current version is 0)
+type: int16 (0 indicates an abort marker, 1 indicates a commit)</code></pre>
<p>The schema for the value of a control record is dependent on the type.
The value is opaque to clients.</p>
<h4 class="anchor-heading"><a id="record" class="anchor-link"></a><a
href="#record">5.3.2 Record</a></h4>
<p>Record level headers were introduced in Kafka 0.11.0. The on-disk
format of a record with Headers is delineated below. </p>
- <p><pre class="line-numbers"><code class="language-java">
length: varint
- attributes: int8
- bit 0~7: unused
- timestampDelta: varlong
- offsetDelta: varint
- keyLength: varint
- key: byte[]
- valueLen: varint
- value: byte[]
- Headers => [Header]</code></pre></p>
+ <pre class="line-numbers"><code class="language-text">length: varint
+attributes: int8
+ bit 0~7: unused
+timestampDelta: varlong
+offsetDelta: varint
+keyLength: varint
+key: byte[]
+valueLen: varint
+value: byte[]
+Headers => [Header]</code></pre>
<h5 class="anchor-heading"><a id="recordheader"
class="anchor-link"></a><a href="#recordheader">5.3.2.1 Record Header</a></h5>
- <p><pre class="line-numbers"><code class="language-java">
headerKeyLength: varint
- headerKey: String
- headerValueLength: varint
- Value: byte[]</code></pre></p>
+ <pre class="line-numbers"><code class="language-text">headerKeyLength:
varint
+headerKey: String
+headerValueLength: varint
+Value: byte[]</code></pre>
<p>We use the same varint encoding as Protobuf. More information on the
latter can be found <a
href="https://developers.google.com/protocol-buffers/docs/encoding#varints";>here</a>.
The count of headers in a record
is also encoded as a varint.</p>
@@ -102,41 +102,42 @@
</p>
<b>Message Set:</b><br>
- <p><pre class="line-numbers"><code class="language-java"> MessageSet
(Version: 0) => [offset message_size message]
- offset => INT64
- message_size => INT32
- message => crc magic_byte attributes key value
- crc => INT32
- magic_byte => INT8
- attributes => INT8
- bit 0~2:
- 0: no compression
- 1: gzip
- 2: snappy
- bit 3~7: unused
- key => BYTES
- value => BYTES</code></pre></p>
- <p><pre class="line-numbers"><code class="language-java"> MessageSet
(Version: 1) => [offset message_size message]
- offset => INT64
- message_size => INT32
- message => crc magic_byte attributes timestamp key value
- crc => INT32
- magic_byte => INT8
- attributes => INT8
- bit 0~2:
- 0: no compression
- 1: gzip
- 2: snappy
- 3: lz4
- bit 3: timestampType
- 0: create time
- 1: log append time
- bit 4~7: unused
- timestamp => INT64
- key => BYTES
- value => BYTES</code></pre></p>
+ <pre class="line-numbers"><code class="language-text">MessageSet (Version:
0) => [offset message_size message]
+offset => INT64
+message_size => INT32
+message => crc magic_byte attributes key value
+ crc => INT32
+ magic_byte => INT8
+ attributes => INT8
+ bit 0~2:
+ 0: no compression
+ 1: gzip
+ 2: snappy
+ bit 3~7: unused
+ key => BYTES
+ value => BYTES</code></pre>
+ <pre class="line-numbers"><code class="language-text">MessageSet (Version:
1) => [offset message_size message]
+offset => INT64
+message_size => INT32
+message => crc magic_byte attributes timestamp key value
+ crc => INT32
+ magic_byte => INT8
+ attributes => INT8
+ bit 0~2:
+ 0: no compression
+ 1: gzip
+ 2: snappy
+ 3: lz4
+ bit 3: timestampType
+ 0: create time
+ 1: log append time
+ bit 4~7: unused
+ timestamp => INT64
+ key => BYTES
+ value => BYTES</code></pre>
<p>
In versions prior to Kafka 0.10, the only supported message format
version (which is indicated in the magic value) was 0. Message format version 1
was introduced with timestamp support in version 0.10.
+ </p>
<ul>
<li>Similarly to version 2 above, the lowest bits of attributes
represent the compression type.</li>
<li>In version 1, the producer should always set the timestamp type
bit to 0. If the topic is configured to use log append time,
@@ -144,7 +145,6 @@
the broker will overwrite the timestamp type and the timestamp in
the message set.</li>
<li>The highest bits of attributes must be set to 0.</li>
</ul>
- </p>
<p>In message format versions 0 and 1 Kafka supports recursive messages to
enable compression. In this case the message's attributes must be set
to indicate one of the compression types and the value field will
contain a message set compressed with that type. We often refer
to the nested messages as "inner messages" and the wrapping message as
the "outer message." Note that the key should be null
@@ -163,7 +163,7 @@
A log for a topic named "my_topic" with two partitions consists of two
directories (namely <code>my_topic_0</code> and <code>my_topic_1</code>)
populated with data files containing the messages for that topic. The format of
the log files is a sequence of "log entries""; each log entry is a 4 byte
integer <i>N</i> storing the message length which is followed by the <i>N</i>
message bytes. Each message is uniquely identified by a 64-bit integer
<i>offset</i> giving the byte position of [...]
</p>
<p>
- The exact binary format for records is versioned and maintained as a
standard interface so record batches can be transferred between producer,
broker, and client without recopying or conversion when desirable. The previous
section included details about the on-disk format of records.</p>
+ The exact binary format for records is versioned and maintained as a
standard interface so record batches can be transferred between producer,
broker, and client without recopying or conversion when desirable. The previous
section included details about the on-disk format of records.
</p>
<p>
The use of the message offset as the message id is unusual. Our original
idea was to use a GUID generated by the producer, and maintain a mapping from
GUID to offset on each broker. But since a consumer must maintain an ID for
each server, the global uniqueness of the GUID provides no value. Furthermore,
the complexity of maintaining the mapping from a random id to an offset
requires a heavy weight index structure which must be synchronized with disk,
essentially requiring a full per [...]
@@ -186,21 +186,21 @@
<p> The following is the format of the results sent to the consumer.
- <pre class="line-numbers"><code class="language-text"> MessageSetSend
(fetch result)
+ <pre class="line-numbers"><code class="language-text">MessageSetSend
(fetch result)
- total length : 4 bytes
- error code : 2 bytes
- message 1 : x bytes
- ...
- message n : x bytes</code></pre>
+total length : 4 bytes
+error code : 2 bytes
+message 1 : x bytes
+...
+message n : x bytes</code></pre>
- <pre class="line-numbers"><code class="language-text">
MultiMessageSetSend (multiFetch result)
+ <pre class="line-numbers"><code class="language-text">MultiMessageSetSend
(multiFetch result)
- total length : 4 bytes
- error code : 2 bytes
- messageSetSend 1
- ...
- messageSetSend n</code></pre>
+total length : 4 bytes
+error code : 2 bytes
+messageSetSend 1
+...
+messageSetSend n</code></pre>
<h4 class="anchor-heading"><a id="impl_deletes" class="anchor-link"></a><a
href="#impl_deletes">Deletes</a></h4>
<p>
Data is deleted one log segment at a time. The log manager applies two
metrics to identify segments which are
@@ -260,7 +260,7 @@
</p>
<h4 class="anchor-heading"><a id="impl_zkbroker"
class="anchor-link"></a><a href="#impl_zkbroker">Broker Node Registry</a></h4>
- <pre class="line-numbers"><code class="language-json">
/brokers/ids/[0...N] -->
{"jmx_port":...,"timestamp":...,"endpoints":[...],"host":...,"version":...,"port":...}
(ephemeral node)</code></pre>
+ <pre class="line-numbers"><code class="language-json">/brokers/ids/[0...N]
-->
{"jmx_port":...,"timestamp":...,"endpoints":[...],"host":...,"version":...,"port":...}
(ephemeral node)</code></pre>
<p>
This is a list of all present broker nodes, each of which provides a
unique logical broker id which identifies it to consumers (which must be given
as part of its configuration). On startup, a broker node registers itself by
creating a znode with the logical broker id under /brokers/ids. The purpose of
the logical broker id is to allow a broker to be moved to a different physical
machine without affecting consumers. An attempt to register a broker id that is
already in use (say becau [...]
</p>
@@ -268,7 +268,7 @@
Since the broker registers itself in ZooKeeper using ephemeral znodes,
this registration is dynamic and will disappear if the broker is shutdown or
dies (thus notifying consumers it is no longer available).
</p>
<h4 class="anchor-heading"><a id="impl_zktopic" class="anchor-link"></a><a
href="#impl_zktopic">Broker Topic Registry</a></h4>
- <pre class="line-numbers"><code class="language-json">
/brokers/topics/[topic]/partitions/[0...N]/state -->
{"controller_epoch":...,"leader":...,"version":...,"leader_epoch":...,"isr":[...]}
(ephemeral node)</code></pre>
+ <pre class="line-numbers"><code
class="language-json">/brokers/topics/[topic]/partitions/[0...N]/state -->
{"controller_epoch":...,"leader":...,"version":...,"leader_epoch":...,"isr":[...]}
(ephemeral node)</code></pre>
<p>
Each broker registers itself under the topics it maintains and stores the
number of partitions for that topic.
diff --git a/28/toc.html b/28/toc.html
index fa11c81..f5b1576 100644
--- a/28/toc.html
+++ b/28/toc.html
@@ -86,26 +86,26 @@
<li><a
href="#basic_ops_increase_replication_factor">Increasing replication factor</a>
</ul>
<li><a href="#datacenters">6.2 Datacenters</a>
- <li><a href="#georeplication">6.3 Geo-Replication
(Cross-Cluster Data Mirroring)</a></li>
+ <li><a href="#georeplication">6.3 Geo-Replication
(Cross-Cluster Data Mirroring)</a></li>
<ul>
- <li><a href="#georeplication-overview">Geo-Replication
Overview</a></li>
- <li><a href="#georeplication-flows">What Are
Replication Flows</a></li>
- <li><a href="#georeplication-mirrormaker">Configuring
Geo-Replication</a></li>
- <li><a href="#georeplication-starting">Starting
Geo-Replication</a></li>
- <li><a href="#georeplication-stopping">Stopping
Geo-Replication</a></li>
- <li><a
href="#georeplication-apply-config-changes">Applying Configuration
Changes</a></li>
- <li><a href="#georeplication-monitoring">Monitoring
Geo-Replication</a></li>
+ <li><a href="#georeplication-overview">Geo-Replication
Overview</a></li>
+ <li><a href="#georeplication-flows">What Are
Replication Flows</a></li>
+ <li><a href="#georeplication-mirrormaker">Configuring
Geo-Replication</a></li>
+ <li><a href="#georeplication-starting">Starting
Geo-Replication</a></li>
+ <li><a href="#georeplication-stopping">Stopping
Geo-Replication</a></li>
+ <li><a
href="#georeplication-apply-config-changes">Applying Configuration
Changes</a></li>
+ <li><a href="#georeplication-monitoring">Monitoring
Geo-Replication</a></li>
</ul>
- <li><a href="#multitenancy">6.4 Multi-Tenancy</a></li>
+ <li><a href="#multitenancy">6.4 Multi-Tenancy</a></li>
<ul>
- <li><a href="#multitenancy-overview">Multi-Tenancy
Overview</a></li>
- <li><a href="#multitenancy-topic-naming">Creating User
Spaces (Namespaces)</a></li>
- <li><a href="#multitenancy-topic-configs">Configuring
Topics</a></li>
- <li><a href="#multitenancy-security">Securing Clusters
and Topics</a></li>
- <li><a href="#multitenancy-isolation">Isolating
Tenants</a></li>
- <li><a href="#multitenancy-monitoring">Monitoring and
Metering</a></li>
- <li><a
href="#multitenancy-georeplication">Multi-Tenancy and Geo-Replication</a></li>
- <li><a href="#multitenancy-more">Further
considerations</a></li>
+ <li><a href="#multitenancy-overview">Multi-Tenancy
Overview</a></li>
+ <li><a href="#multitenancy-topic-naming">Creating User
Spaces (Namespaces)</a></li>
+ <li><a href="#multitenancy-topic-configs">Configuring
Topics</a></li>
+ <li><a href="#multitenancy-security">Securing Clusters
and Topics</a></li>
+ <li><a href="#multitenancy-isolation">Isolating
Tenants</a></li>
+ <li><a href="#multitenancy-monitoring">Monitoring and
Metering</a></li>
+ <li><a
href="#multitenancy-georeplication">Multi-Tenancy and Geo-Replication</a></li>
+ <li><a href="#multitenancy-more">Further
considerations</a></li>
</ul>
<li><a href="#config">6.5 Important Configs</a>
<ul>
