ChenLin created KAFKA-8465:
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Summary: 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: 2.2.1, 2.2.0, 2.0.1
Reporter: ChenLin
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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