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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2021/02/06 04:16:00 UTC

[jira] [Assigned] (SPARK-34383) Optimize WAL commit phase on SS

     [ https://issues.apache.org/jira/browse/SPARK-34383?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-34383:
------------------------------------

    Assignee: Apache Spark

> Optimize WAL commit phase on SS
> -------------------------------
>
>                 Key: SPARK-34383
>                 URL: https://issues.apache.org/jira/browse/SPARK-34383
>             Project: Spark
>          Issue Type: Improvement
>          Components: Structured Streaming
>    Affects Versions: 3.2.0
>            Reporter: Jungtaek Lim
>            Assignee: Apache Spark
>            Priority: Major
>
> I found there're unnecessary access / expensive operation of file system in WAL commit phase of SS.
> They can be optimized via caching (using driver memory a bit) & replacing FS operation. This brings reduced latency per batch, especially checkpoint against object store.



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