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https://issues.apache.org/jira/browse/HBASE-6466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13424716#comment-13424716
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chunhui shen commented on HBASE-6466:
-------------------------------------

bq.So in startCacheFlush we will now be blocking the incoming writes more right?
As more flush threads will try getting the updatesLock.writeLock

We will blocking the incoming writes when doing HLog#startCacheFlush now, it is 
the same as before.

Flush threads will try getting the updatesLock.writeLock, it is also same as 
the before, but it's quite fast, so do you think it's a problem?


                
> Enable multi-thread for memstore flush
> --------------------------------------
>
>                 Key: HBASE-6466
>                 URL: https://issues.apache.org/jira/browse/HBASE-6466
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: chunhui shen
>            Assignee: chunhui shen
>         Attachments: HBASE-6466.patch, HBASE-6466v2.patch, HBASE-6466v3.patch
>
>
> If the KV is large or Hlog is closed with high-pressure putting, we found 
> memstore is often above the high water mark and block the putting.
> So should we enable multi-thread for Memstore Flush?

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