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https://issues.apache.org/jira/browse/HBASE-6666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13540864#comment-13540864
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Anoop Sam John commented on HBASE-6666:
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Within a RegionObserver we can access any other region in that RS via the
HRegionServer#getOnlineRegion ??
e.getEnvironment().getRegionServerServices().getOnlineRegions(tableName)
Or you mean some thing else here?
> Allow RegionObserver to access other regions on the same server.
> ----------------------------------------------------------------
>
> Key: HBASE-6666
> URL: https://issues.apache.org/jira/browse/HBASE-6666
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
>
> This is an idea I had some time back. It would be nice if a RegionObserver
> (or Endpoint) could get access to all other regions on the same RegionServer
> to efficiently make updates to those regions as well (instead of going
> through the standard HTable path).
> Together with a smart region placement strategy this can lead to much better
> performance for some coprocessor tasks.
> Maybe it could be abstracted in a special HTable implementation.
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