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https://issues.apache.org/jira/browse/HBASE-5699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13279667#comment-13279667
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Todd Lipcon commented on HBASE-5699:
------------------------------------

I think with durable sync, having a WAL-per-region would be even less feasible 
than it is today -- we currently depend on batching in order to get good 
throughput. If a server has 50 regions, then you'd get 50x less batching 
opportunity and write throughput would grind to a halt. Imagine a fan-out write 
to all of the regions -- it would generate 50 disk seeks instead of just 1.

                
> 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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