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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12603) Enable async edit logging by default
Date Mon, 09 Oct 2017 22:35:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16197813#comment-16197813
] 

Andrew Wang commented on HDFS-12603:
------------------------------------

Adding a thread sleep is rather unsatisfying, is there something better we can do with a lock
or barrier via a static fault injector class?

Also, seems like we should revert the trunk/branch-3.0 patches too, and go with something
like this new version. Thoughts?

> Enable async edit logging by default
> ------------------------------------
>
>                 Key: HDFS-12603
>                 URL: https://issues.apache.org/jira/browse/HDFS-12603
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>    Affects Versions: 2.8.0, 2.9.0, 3.0.0-alpha1
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>             Fix For: 3.0.0
>
>         Attachments: HDFS-12603.001.patch, HDFS-12603.002.patch, HDFS-12603.003.patch,
HDFS-12603.branch-2.01.patch, HDFS-12603.branch-2.02.patch
>
>
> HDFS-7964 added support for async edit logging. Based on further discussion in that JIRA,
we think it's safe to turn this on by default for better out-of-the-box performance.



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