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https://issues.apache.org/jira/browse/HBASE-6466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13424037#comment-13424037
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Jean-Daniel Cryans commented on HBASE-6466:
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How does this relate to HBASE-2832? It's a shame the patch of there was lost
tho. Jon Gray might still have it somewhere.
Also if this patch doesn't modify the behavior of {{HLog.startCacheFlush}} and
{{HLog.completeCacheFlush}} WRT the {{cacheFlushLock}} I can't see how it could
make things any faster. In fact, it's even worse since the other flushing
thread acquire a write lock just before getting the flush lock (meaning that
while one thread flushes, the others are blocking the inserts and not flushing).
> 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
>
>
> 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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