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https://issues.apache.org/jira/browse/HBASE-12031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14141431#comment-14141431
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stack commented on HBASE-12031:
-------------------------------
Can we put up a little harness that stands up an HRegion and then does Scans
against it? Will be easier to profile. Also related is Liang's work over here
"HDFS-6735
A minor optimization to avoid pread() be blocked by read() inside the same
DFSInputStream"
> Parallel Scanners inside Region
> -------------------------------
>
> Key: HBASE-12031
> URL: https://issues.apache.org/jira/browse/HBASE-12031
> Project: HBase
> Issue Type: New Feature
> Components: Performance, Scanners
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
>
> This JIRA to improve performance of multiple scanners running on a same
> region in parallel. The scenarios where we will get the performance benefits:
> * New TableInputFormat with input splits smaller than HBase Region.
> * Scanning during compaction (Compaction scanner and application scanner over
> the same Region).
> Some JIRAs related to this one:
> https://issues.apache.org/jira/browse/HBASE-7336
> https://issues.apache.org/jira/browse/HBASE-5979
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