dnishimura opened a new pull request #1125: SAMZA-2286: Integrate MetadataStore#putAll for improved startup time. URL: https://github.com/apache/samza/pull/1125 This PR integrates `MetadataStore#putAll` with `TaskAssignmentManager`, `TaskPartitionAssignmentManager`, `ChangelogStreamManager` and `ZkJobCoordinator` when writing assignments to the coordinator stream. For a Kafka-based coordinator stream, the `putAll` method allows multiple messages to be produced before calling flush. We have observed in preliminary benchmark tests that this provides an order of magnitude improvement when calling `putAll` vs. `put` for each entry. The impact is faster startup times. @shanthoosh - please take a look since you have the most context.
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