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https://issues.apache.org/jira/browse/KAFKA-8465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16853964#comment-16853964
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ASF GitHub Bot commented on KAFKA-8465:
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lordcheng10 commented on pull request #6862: [KAFKA-8465]Copying strategy for
the topic dimension
URL: https://github.com/apache/kafka/pull/6862
*More detailed description of your change,
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*Summary of testing strategy (including rationale)
for the feature or bug fix. Unit and/or integration
tests are expected for any behaviour change and
system tests should be considered for larger changes.*
### Committer Checklist (excluded from commit message)
- [ ] Verify design and implementation
- [ ] Verify test coverage and CI build status
- [ ] Verify documentation (including upgrade notes)
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> Copying strategy for the topic dimension
> ----------------------------------------
>
> Key: KAFKA-8465
> URL: https://issues.apache.org/jira/browse/KAFKA-8465
> Project: Kafka
> Issue Type: Improvement
> Components: core
> Affects Versions: 2.0.1, 2.2.0, 2.2.1
> Reporter: ChenLin
> Priority: Major
>
> When some partiton's replication is assigned to a broker, which disks should
> these copies be placed on the broker? The original strategy is to allocate
> according to the number of partiitons, but this will cause a partiton with
> too many topics to be stored on a disk, which may cause disk hotspot problems.
> In order to solve this problem, we propose an improved strategy: first ensure
> that the number of partitions of each disk in the topic dimension is even. If
> the number of partitions of a topic on two disks is equal, then sort
> according to the total number of partitions on the disk. Select a disk with
> the least number of partitions to store the current replication.
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