History

Alyssa Huang 97db06689b CI / build (push) Waiting to run Details KAFKA-18345; Wait the entire election timeout on election loss (#19747 ) Replaces exponential backoff for candidate state after losing election with waiting rest of election timeout. There is no need to have an exponential backoff when the election timeout already provides a natural throttle and it is randomized. Reviewers: José Armando García Sancio <jsancio@apache.org>, TaiJuWu <tjwu1217@gmail.com>		2025-05-23 12:35:49 -04:00
..
bin	KAFKA-18388 test-kraft-server-start.sh should use log4j2.yaml (#18370 )	2025-01-07 04:20:06 +08:00
config	KAFKA-18388 test-kraft-server-start.sh should use log4j2.yaml (#18370 )	2025-01-07 04:20:06 +08:00
src	KAFKA-18345; Wait the entire election timeout on election loss (#19747 )	2025-05-23 12:35:49 -04:00
.gitignore	KAFKA-13429: ignore bin on new modules (#11415 )	2021-11-10 14:36:24 -06:00
README.md	KAFKA-17728 Add missing config `replica-directory-id` to raft README (#17518 )	2024-10-17 11:32:27 +08:00

README.md

KRaft (Kafka Raft)

KRaft (Kafka Raft) is a protocol based on the Raft Consensus Protocol tailored for Apache Kafka.

This is used by Apache Kafka in the KRaft (Kafka Raft Metadata) mode. We also have a standalone test server which can be used for performance testing. We describe the details to set this up below.

Run Single Quorum

bin/test-kraft-server-start.sh --config config/kraft.properties --replica-directory-id b8tRS7h4TJ2Vt43Dp85v2A

Run Multi Node Quorum

Create 3 separate KRaft quorum properties as the following:

cat << EOF >> config/kraft-quorum-1.properties

node.id=1
listeners=PLAINTEXT://localhost:9092
controller.listener.names=PLAINTEXT
controller.quorum.voters=1@localhost:9092,2@localhost:9093,3@localhost:9094
log.dirs=/tmp/kraft-logs-1
EOF

cat << EOF >> config/kraft-quorum-2.properties

node.id=2
listeners=PLAINTEXT://localhost:9093
controller.listener.names=PLAINTEXT
controller.quorum.voters=1@localhost:9092,2@localhost:9093,3@localhost:9094
log.dirs=/tmp/kraft-logs-2
EOF

cat << EOF >> config/kraft-quorum-3.properties

node.id=3
listeners=PLAINTEXT://localhost:9094
controller.listener.names=PLAINTEXT
controller.quorum.voters=1@localhost:9092,2@localhost:9093,3@localhost:9094
log.dirs=/tmp/kraft-logs-3
EOF

Open up 3 separate terminals, and run individual commands:

bin/test-kraft-server-start.sh --config config/kraft-quorum-1.properties --replica-directory-id b8tRS7h4TJ2Vt43Dp85v2A
bin/test-kraft-server-start.sh --config config/kraft-quorum-2.properties --replica-directory-id Nkij_D9XRiYKNb41SiJo7Q
bin/test-kraft-server-start.sh --config config/kraft-quorum-3.properties --replica-directory-id 4-e97nI7eHPYKfEDtW8rtQ

Once a leader is elected, it will begin writing to an internal __raft_performance_test topic with a steady workload of random data. You can control the workload using the --throughput and --record-size arguments passed to test-kraft-server-start.sh.