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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5699) Run with > 1 WAL in HRegionServer
Date Tue, 01 May 2012 01:44:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13265596#comment-13265596
] 

Todd Lipcon commented on HBASE-5699:
------------------------------------

bq. Currently each HRegion has reference to the HLog it uses. If requests can be freely redirected
to the HLog instance having fewer outstanding requests, the reference would be to that of
the region server.

Sorry, I should be less free-wheeling with my terminology. My thought was that there is still
a single "HLog" class, but underneath it would be multiple "SequenceFileLogWriters", most
likely. Though maybe the correct implementation is to make HLog an interface, and then have
a MultiHLog which wraps N other HLogs or something. Either way, any region would only have
a reference to one "HLog" object, which might have more than one underlying stream.
                
> 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
>


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