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https://issues.apache.org/jira/browse/HBASE-5699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13279912#comment-13279912
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Lars Hofhansl commented on HBASE-5699:
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Good point.
Was referring to the general feature, not necessarily WAL/Region.
It's a trade off: Batching vs. parallel writes (just to state the obvious)
Do we batch beyond a region normally, though? Maybe during cache flush.
Yeah, WAL/Region with sync is probably not a good idea, there just won't be
enough spindles in the HDFS cluster to absorb that.
So what's a good heuristic for the number of WALs? Maybe (assuming good block
distribution and that HBase is the only user of the cluster) it should be
around #spindles/#replicas...?
> 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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