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Posted to issues@hbase.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2015/04/22 13:04:59 UTC

[jira] [Commented] (HBASE-13529) Procedure v2 - WAL Improvements

    [ https://issues.apache.org/jira/browse/HBASE-13529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14506824#comment-14506824 ] 

Ted Yu commented on HBASE-13529:
--------------------------------

Lgtm 

> Procedure v2 - WAL Improvements
> -------------------------------
>
>                 Key: HBASE-13529
>                 URL: https://issues.apache.org/jira/browse/HBASE-13529
>             Project: HBase
>          Issue Type: Sub-task
>          Components: proc-v2
>    Affects Versions: 2.0.0, 1.1.0
>            Reporter: Matteo Bertozzi
>            Assignee: Matteo Bertozzi
>            Priority: Minor
>             Fix For: 2.0.0, 1.1.0
>
>         Attachments: HBASE-13529-v0.patch, ProcedureStoreTest.java
>
>
> from the discussion in HBASE-12439 the wal was resulting slow.
>  * there is an error around the awake of the slotCond.await(), causing more wait then necessary
>  * ArrayBlockingQueue is dog slow, replace it with ConcurrentLinkedQueue
>  * roll the wal only if reaches a threshold (conf ops) to amortize the cost
>  * hsync() is used by default, when the normal wal is using just hflush() make it tunable via conf



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