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