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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7801) Allow a deferred sync option per Mutation.
Date Thu, 14 Feb 2013 07:16:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13578193#comment-13578193
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Lars Hofhansl commented on HBASE-7801:
--------------------------------------

[~anoopsamjohn] I was thinking that if the table is set up with deferred flush then we'd honor
that like we do now. Otherwise that option would be always ignored unless all Mutations are
marked with deferFlush (something that an old client cannot even do).
Note that a Mutation does not explicitly say it wants to sync, it only explicitly state when
it doesn't.

Another option to make this a bit nicer is to pass the shouldSyncWal flag to syncOrDefer and
hence all the decision logic about whether to flush or not in that method.

                
> Allow a deferred sync option per Mutation.
> ------------------------------------------
>
>                 Key: HBASE-7801
>                 URL: https://issues.apache.org/jira/browse/HBASE-7801
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>             Fix For: 0.96.0, 0.94.6
>
>         Attachments: 7801-0.94-v1.txt
>
>
> Won't have time for parent. But a deferred sync option on a per operation basis comes
up quite frequently.
> In 0.96 this can be handled cleanly via protobufs and 0.94 we can have a special mutation
attribute.
> For batch operation we'd take the safest sync option of any of the mutations. I.e. if
there is at least one that wants to be flushed we'd sync the batch, if there's none of those
but at least one that wants deferred flush we defer flush the batch, etc.

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