1# Licensed to the Apache Software Foundation (ASF) under one or more
2# contributor license agreements.  See the NOTICE file distributed with
3# this work for additional information regarding copyright ownership.
4# The ASF licenses this file to You under the Apache License, Version 2.0
5# (the "License"); you may not use this file except in compliance with
6# the License.  You may obtain a copy of the License at
7#
8#    http://www.apache.org/licenses/LICENSE-2.0
9#
10# Unless required by applicable law or agreed to in writing, software
11# distributed under the License is distributed on an "AS IS" BASIS,
12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13# See the License for the specific language governing permissions and
14# limitations under the License.
15
16#
17# This configuration file is intended for use in KRaft mode, where
18# Apache ZooKeeper is not present.  See config/kraft/README.md for details.
19#
20
21############################# Server Basics #############################
22
23# The role of this server. Setting this puts us in KRaft mode
24process.roles=broker,controller
25
26# The node id associated with this instance's roles
27node.id=1
28
29# The connect string for the controller quorum
30controller.quorum.voters=1@localhost:9093
31
32############################# Socket Server Settings #############################
33
34# The address the socket server listens on. It will get the value returned from
35# java.net.InetAddress.getCanonicalHostName() if not configured.
36#   FORMAT:
37#     listeners = listener_name://host_name:port
38#   EXAMPLE:
39#     listeners = PLAINTEXT://your.host.name:9092
40listeners=PLAINTEXT://:9092,CONTROLLER://:9093
41inter.broker.listener.name=PLAINTEXT
42
43# Hostname and port the broker will advertise to producers and consumers. If not set,
44# it uses the value for "listeners" if configured.  Otherwise, it will use the value
45# returned from java.net.InetAddress.getCanonicalHostName().
46advertised.listeners=PLAINTEXT://localhost:9092
47
48# Listener, host name, and port for the controller to advertise to the brokers. If
49# this server is a controller, this listener must be configured.
50controller.listener.names=CONTROLLER
51
52# Maps listener names to security protocols, the default is for them to be the same. See the config documentation for more details
53listener.security.protocol.map=CONTROLLER:PLAINTEXT,PLAINTEXT:PLAINTEXT,SSL:SSL,SASL_PLAINTEXT:SASL_PLAINTEXT,SASL_SSL:SASL_SSL
54
55# The number of threads that the server uses for receiving requests from the network and sending responses to the network
56num.network.threads=3
57
58# The number of threads that the server uses for processing requests, which may include disk I/O
59num.io.threads=8
60
61# The send buffer (SO_SNDBUF) used by the socket server
62socket.send.buffer.bytes=102400
63
64# The receive buffer (SO_RCVBUF) used by the socket server
65socket.receive.buffer.bytes=102400
66
67# The maximum size of a request that the socket server will accept (protection against OOM)
68socket.request.max.bytes=104857600
69
70
71############################# Log Basics #############################
72
73# A comma separated list of directories under which to store log files
74log.dirs=/tmp/kraft-combined-logs
75
76# The default number of log partitions per topic. More partitions allow greater
77# parallelism for consumption, but this will also result in more files across
78# the brokers.
79num.partitions=1
80
81# The number of threads per data directory to be used for log recovery at startup and flushing at shutdown.
82# This value is recommended to be increased for installations with data dirs located in RAID array.
83num.recovery.threads.per.data.dir=1
84
85############################# Internal Topic Settings  #############################
86# The replication factor for the group metadata internal topics "__consumer_offsets" and "__transaction_state"
87# For anything other than development testing, a value greater than 1 is recommended to ensure availability such as 3.
88offsets.topic.replication.factor=1
89transaction.state.log.replication.factor=1
90transaction.state.log.min.isr=1
91
92############################# Log Flush Policy #############################
93
94# Messages are immediately written to the filesystem but by default we only fsync() to sync
95# the OS cache lazily. The following configurations control the flush of data to disk.
96# There are a few important trade-offs here:
97#    1. Durability: Unflushed data may be lost if you are not using replication.
98#    2. Latency: Very large flush intervals may lead to latency spikes when the flush does occur as there will be a lot of data to flush.
99#    3. Throughput: The flush is generally the most expensive operation, and a small flush interval may lead to excessive seeks.
100# The settings below allow one to configure the flush policy to flush data after a period of time or
101# every N messages (or both). This can be done globally and overridden on a per-topic basis.
102
103# The number of messages to accept before forcing a flush of data to disk
104#log.flush.interval.messages=10000
105
106# The maximum amount of time a message can sit in a log before we force a flush
107#log.flush.interval.ms=1000
108
109############################# Log Retention Policy #############################
110
111# The following configurations control the disposal of log segments. The policy can
112# be set to delete segments after a period of time, or after a given size has accumulated.
113# A segment will be deleted whenever *either* of these criteria are met. Deletion always happens
114# from the end of the log.
115
116# The minimum age of a log file to be eligible for deletion due to age
117log.retention.hours=168
118
119# A size-based retention policy for logs. Segments are pruned from the log unless the remaining
120# segments drop below log.retention.bytes. Functions independently of log.retention.hours.
121#log.retention.bytes=1073741824
122
123# The maximum size of a log segment file. When this size is reached a new log segment will be created.
124log.segment.bytes=1073741824
125
126# The interval at which log segments are checked to see if they can be deleted according
127# to the retention policies
128log.retention.check.interval.ms=300000
129