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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1944) Add a "is synced" attribute to HTD
Date Fri, 30 Oct 2009 01:43:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12771735#action_12771735

Jean-Daniel Cryans commented on HBASE-1944:

I just tested this patch on a cluster, I get 1300 incrCol/sec with a single threaded client
on a table that doesn't sync. I killed -9 the RS a couple of times and even with optional
sync every 100ms I lose only 1-2 edits.

> Add a "is synced" attribute to HTD
> ----------------------------------
>                 Key: HBASE-1944
>                 URL: https://issues.apache.org/jira/browse/HBASE-1944
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>             Fix For: 0.21.0
>         Attachments: HBASE-1944.patch
> At SU we have a case where we'd like to be able to, by default, sync every appended edit
but for some tables have the control to disable their sync. You could then rely on other tables
like .META. to do syncs, the optional log syncer timer down in LogSyncer and user tables that
are always synced. For example, set a 10ms timer on the log syncer so that in the worse case
you lose 10ms of non-catalog edits.

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