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From "Sihua Zhou (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-8922) Revert FLINK-8859 because it causes segfaults in testing
Date Mon, 12 Mar 2018 13:02:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-8922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16395198#comment-16395198
] 

Sihua Zhou commented on FLINK-8922:
-----------------------------------

[~StephanEwen] About the costs with (or without) WAL, I did have some tests for that (On my
macbook (ssd)):
{code}
---->number of records = 1000
disable WAL cost:7 ms
enable WAL cost:17 ms
---->
---->number of records = 10000
disable WAL cost:46 ms
enable WAL cost:153 ms
---->
---->number of records = 100000
disable WAL cost:1111 ms
enable WAL cost:1378 ms
---->
---->number of records = 1000000
disable WAL cost:3865 ms
enable WAL cost:9347 ms
---->
---->number of records = 10000000
disable WAL cost:36861 ms
enable WAL cost:97916 ms
---->
{code}


> Revert FLINK-8859 because it causes segfaults in testing
> --------------------------------------------------------
>
>                 Key: FLINK-8922
>                 URL: https://issues.apache.org/jira/browse/FLINK-8922
>             Project: Flink
>          Issue Type: Bug
>          Components: State Backends, Checkpointing
>    Affects Versions: 1.5.0
>            Reporter: Stefan Richter
>            Assignee: Stefan Richter
>            Priority: Major
>             Fix For: 1.5.0
>
>
> We need to revertĀ FLINK-8859 because it causes problems with RocksDB that make our automated
tests fail on Travis. The change looks actually good and it is currently unclear why this
can introduce such a problem. This might also be a Rocks in RocksDB. Nevertheless, for the
sake of a proper release testing, we should revert the change for now.



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