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Posted to issues@spark.apache.org by "Jungtaek Lim (Jira)" <ji...@apache.org> on 2019/11/19 05:33:01 UTC
[jira] [Commented] (SPARK-28870) Snapshot event log files to
support incremental reading
[ https://issues.apache.org/jira/browse/SPARK-28870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16977128#comment-16977128 ]
Jungtaek Lim commented on SPARK-28870:
--------------------------------------
Given we have SPARK-29779, this issue is orthogonal to SPARK-28594. This can be promoted as an issue (maybe umbrella) and SPARK-29111 and SPARK-29261 can be migrated to this issue.
> Snapshot event log files to support incremental reading
> -------------------------------------------------------
>
> Key: SPARK-28870
> URL: https://issues.apache.org/jira/browse/SPARK-28870
> Project: Spark
> Issue Type: Sub-task
> Components: Spark Core
> Affects Versions: 3.0.0
> Reporter: Jungtaek Lim
> Priority: Major
>
> This issue tracks the effort on compacting event log files into snapshot and enable incremental reading to speed up replaying event logs.
> This issue will be on top of SPARK-28869 as SPARK-28869 will create rolled event log files. This issue will be also on top of SPARK-29111 and SPARK-29261, as SPARK-29111 will add the ability to snapshot/restore from/to KVStore and SPARK-29261 will add the ability to snapshot/restore of state of (SQL)AppStatusListeners.
> Note that both SPARK-29261 and SPARK-29111 will not be guaranteeing any compatibility, and this issue should deal with two situations as well: 1) some part of event log files got deleted 2) snapshot version is not compatible with SHS.
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