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https://issues.apache.org/jira/browse/HBASE-19344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16266299#comment-16266299
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Duo Zhang commented on HBASE-19344:
-----------------------------------
There is a "hbase.wal.async.create.retries" config which limits the max retries
when creating wal and default value is 10, which means if we fail 10 times when
creating wal writer then we will throw the exception out and in LogRoller we
will abort the RS.
Thanks.
> improve asyncWAL by using Independent thread for netty #IO in
> FanOutOneBlockAsyncDFSOutput
> -------------------------------------------------------------------------------------------
>
> Key: HBASE-19344
> URL: https://issues.apache.org/jira/browse/HBASE-19344
> Project: HBase
> Issue Type: Sub-task
> Components: wal
> Affects Versions: 2.0.0-beta-1
> Reporter: Chance Li
> Assignee: Chance Li
> Fix For: 2.0.0
>
> Attachments: HBASE-19344-branch2.patch,
> HBASE-19344-branch2.patch.2.POC, wal-1-test-result.png,
> wal-8-test-result.png, ycsb_result_apache20_async_wal.pdf
>
>
> The logic now is that the netty #IO thread and asyncWal's thread are the same
> one.
> Improvement proposal:
> 1, Split into two.
> 2, All multiWal share the netty #IO thread pool.
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