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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7801) Allow a deferred sync option per Mutation.
Date Tue, 09 Apr 2013 17:56:17 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13626882#comment-13626882
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Enis Soztutar commented on HBASE-7801:
--------------------------------------

Thanks Lars, this looks better. Could you please address these two as well: 
- Durability.java need InterfaceAudience annotations.
- Should we add some pointers in SYNC_WAL, and FSYNC_WAL javadocs to hflush, hsync semantics?
It might be confusing to first time comers.

                
> 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
>    Affects Versions: 0.94.6, 0.95.0
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>             Fix For: 0.98.0, 0.94.7, 0.95.1
>
>         Attachments: 7801-0.94-v1.txt, 7801-0.94-v2.txt, 7801-0.94-v3.txt, 7801-0.96-full-v2.txt,
7801-0.96-full-v3.txt, 7801-0.96-full-v4.txt, 7801-0.96-full-v5.txt, 7801-0.96-v1.txt, 7801-0.96-v6.txt,
7801-0.96-v7.txt, 7801-0.96-v8.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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