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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13529) Procedure v2 - WAL Improvements
Date Fri, 24 Apr 2015 11:36:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14510875#comment-14510875
] 

Hudson commented on HBASE-13529:
--------------------------------

SUCCESS: Integrated in HBase-1.2 #19 (See [https://builds.apache.org/job/HBase-1.2/19/])
HBASE-13529 Procedure v2 - WAL Improvements (matteo.bertozzi: rev 0b86c75220893f6a7c42ea85a94ca1632b319665)
* hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/util/StringUtils.java
* hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/ProcedureStoreTracker.java
* hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/store/TestProcedureStoreTracker.java
* hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/wal/WALProcedureStore.java


> 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: Blocker
>             Fix For: 2.0.0, 1.1.0
>
>         Attachments: HBASE-13529-v0.patch, HBASE-13529-v1.patch, HBASE-13529-v2.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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