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https://issues.apache.org/jira/browse/HBASE-12202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14163625#comment-14163625
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stack commented on HBASE-12202:
-------------------------------
Good one [~anoop.hbase] I was looking in these parts these last few days. I
was trying to shoehorn in using the ByteBuffer API on DFSInputStream
HBASE-11710 to try and see if speedup. If we got data from DFS in ByteBuffers,
we might be able to make use of the native checksummers (probably not directly,
not w/o work -- checksumming is from 20--30% of CPU used in simple tests). So,
read into offheap BB and passing to checksummer offheap could be a win. Would
mean we' need to change read to be ByteBuffer rather than byte [] -based.
Seemed like substantial change but we are doing a bit of ByteBuffer slinging
already in here in HFileBlock? WDYT?
> Support DirectByteBuffer usage in HFileBlock
> --------------------------------------------
>
> Key: HBASE-12202
> URL: https://issues.apache.org/jira/browse/HBASE-12202
> Project: HBase
> Issue Type: Sub-task
> Components: regionserver, Scanners
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Fix For: 2.0.0, 0.99.1
>
>
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