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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5699) Run with > 1 WAL in HRegionServer
Date Mon, 15 Apr 2013 10:12:17 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13631631#comment-13631631
] 

Anoop Sam John commented on HBASE-5699:
---------------------------------------

May be we need to combine efforts here with HBASE-7835 
[~jeffreyz] Working with HBASE-7835 where he try to do WAL replay with HTable#put()

I had added below comment to HBASE-7835
{quote}
I was thinking on this area. We have different JIRAs now related to HLOG and its split and
replay.
This one + HBASE-6772 + multi WAL...
Can we think on all together. 
For multi WAL if we have a fixed set of regions for one WAL approach, during one RS down Master
can assign those regions(Try max) to another one RS [Region groups in RS]. If the corresponding
HLog file also assigned to that RS, then for the replay it can directly do puts on the region
rather than IPC.
{quote}

If we can do all these I think MTTR also can be improved.
I will start working with JIRA (along with Ram) from next week.
                
> Run with > 1 WAL in HRegionServer
> ---------------------------------
>
>                 Key: HBASE-5699
>                 URL: https://issues.apache.org/jira/browse/HBASE-5699
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: binlijin
>            Assignee: Li Pi
>         Attachments: PerfHbase.txt
>
>


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