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Genmao Yu commented on KAFKA-5928: ---------------------------------- I am working on this > Avoid redundant requests to zookeeper when reassign topic partition > ------------------------------------------------------------------- > > Key: KAFKA-5928 > URL: https://issues.apache.org/jira/browse/KAFKA-5928 > Project: Kafka > Issue Type: Improvement > Components: admin > Affects Versions: 0.10.2.1, 0.11.0.0 > Reporter: Genmao Yu > > We mistakenly request topic level information according to partitions config > in the assignment json file. For example > https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/admin/ReassignPartitionsCommand.scala#L550: > {code} > val validPartitions = proposedPartitionAssignment.filter { case (p, _) => > validatePartition(zkUtils, p.topic, p.partition) } > {code} > If reassign 1000 partitions (in 10 topics), we need to request zookeeper 1000 > times here. But actually we only need to request just 10 (topics) times. We > test a large-scale assignment, about 10K partitions. It takes tens of > minutes. After optimization, it will reduce to less than 1minute. -- This message was sent by Atlassian JIRA (v6.4.14#64029)