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Without tiered storage, the rebuilding broker has to read a large amount of data from the local hard disks of the leaders. This competes page cache and local disk bandwidth with the normal traffic, and dramatically increases the acks=all produce latency.

Future work

• Enhance RLMM implementation based on topic based storage pointing to a target Kafka cluster instead of using as system level topic with in the cluster.  
• Improve default RLMM implementation with less chatty protocol.

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