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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1535) Add client ability to perform mutations without the WAL
Date Wed, 17 Jun 2009 23:20:07 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12720983#action_12720983
] 

Jonathan Gray commented on HBASE-1535:
--------------------------------------

Bypassing the WAL breaks a whole bunch of stuff.  It would need to come with a warning about
what it means.

This "feature" doesn't break 1295, rather just like setting this makes it so you can't recover
under RS failure, it also makes it so you are not replicating your edits.

> Add client ability to perform mutations without the WAL
> -------------------------------------------------------
>
>                 Key: HBASE-1535
>                 URL: https://issues.apache.org/jira/browse/HBASE-1535
>             Project: Hadoop HBase
>          Issue Type: New Feature
>    Affects Versions: 0.20.0
>            Reporter: Jonathan Gray
>            Assignee: Jonathan Gray
>             Fix For: 0.20.1
>
>         Attachments: HBASE-1535-v1.patch, HBASE-1535-v2.patch
>
>
> There are a number of cases where a client might not want/need its edits to be written
into the HLog.  The most obvious use of this would be during a bulk import where we want the
best performance possible and data loss is acceptable (can rerun the import).
> Does this become a flag on Put or a special mode of HTable?

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