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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1563) incrementColumnValue does not write to WAL
Date Tue, 23 Jun 2009 23:21:07 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12723356#action_12723356
] 

stack commented on HBASE-1563:
------------------------------

Ryan notes that old code did row lock and was fast.

So, we should go ahead and pull the KV from memcache, copy it, increment it, add to WAL, then
insert back into memcache?  It won't be too slow?  Maybe only do this if write to wal is enabled?

> incrementColumnValue does not write to WAL
> ------------------------------------------
>
>                 Key: HBASE-1563
>                 URL: https://issues.apache.org/jira/browse/HBASE-1563
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: Jonathan Gray
>            Assignee: Jonathan Gray
>             Fix For: 0.20.0
>
>         Attachments: HBASE-1563-v1.patch, HBASE-1563-v2.patch, HBASE-1563-v3.patch
>
>
> Incrementing never writes to the WAL.  Under failure scenarios, you will lose all increments
since the last flush.
> Do we want to expose the option to the client as to whether to write to WAL or not?

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