I really like the idea of offering more flexible and powerful assignment policies. However, maintaining such implementations could become an overhead for the community. This is especially important because Apache Kafka places a strong emphasis on compatibility.
The value of this KIP lies in opening the door for advanced developers to deploy custom assignments without modifying the source code. With respect to this KIP, perhaps we could expose a public configuration backed by UNSTABLE APIs. This approach would give us the flexibility to adjust the APIs in minor releases Best, Chia-Ping On 2025/08/18 02:21:15 peng wrote: > I think making `ReplicaPlacer` configurable is a good strategy. We can > integrate KIP-1194: Optimize Replica Assignment for Broker Load Balance in > Uneven Rack Configurations into it, allowing users to choose between the > current `StripedReplicaPlacer` approach or the `WeightedReplicaPlacer` > mentioned in KIP-1194. > > Perhaps the replica reassignment algorithm could also be made configurable, > enabling users to select solutions like KIP-1151: Minimal movement replica > balancing algorithm through configuration. > > 黃竣陽 <s7133...@gmail.com> 于 2025年8月6日周三 下午8:03写道： > > > Hello chia, > > > > Thanks for the reply, > > > > chia_00, chia_01, chia_02: I have updated the KIP based on your comments. > > > > Best Regards, > > Jiunn-Yang > > > > > Chia-Ping Tsai <chia7...@gmail.com> 於 2025年8月6日 凌晨12:18 寫道： > > > > > > hi Jiunn-Yang > > > > > > chia_00: > > > > > > Could you please add more alternatives? For example, users could use the > > > admin to reassign partitions after the topics are created, or specify the > > > assignments directly when creating the topics > > > > > > chia_01: > > > > > > should we consider making `ReplicaPlacer` configurable? > > > > > > chia_02: > > > > > > Could you please enrice the documentation to remind users that this > > > configuration is internal, and clarify the specific use cases where it > > > might be relevant? > > > > > > Best, > > > Chia-Ping > > > > > > 黃竣陽 <s7133...@gmail.com> 於 2025年8月5日 週二 下午11:24寫道： > > > > > >> Hello everyone, > > >> > > >> I would like to start a discussion on KIP-1203: Allow to configure > > custom > > >> `ReplicaPlacer` implementation > > >> <https://cwiki.apache.org/confluence/x/dxFJFg> > > >> > > >> This proposal introduces a new internal configuration, > > >> replica.placer.class.name, which > > >> allows users to specify a custom implementation of ReplicaPlacer. > > >> > > >> Best regards, > > >> Jiunn-Yang > > > > >
