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https://issues.apache.org/jira/browse/HBASE-21946?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang resolved HBASE-21946.
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Resolution: Fixed
> Use ByteBuffer pread instead of byte[] pread in HFileBlock when applicable
> --------------------------------------------------------------------------
>
> Key: HBASE-21946
> URL: https://issues.apache.org/jira/browse/HBASE-21946
> Project: HBase
> Issue Type: Improvement
> Components: Offheaping
> Reporter: Zheng Hu
> Assignee: Wei-Chiu Chuang
> Priority: Critical
> Fix For: 2.5.0, 3.0.0-alpha-2
>
> Attachments: HBASE-21946.HBASE-21879.v01.patch,
> HBASE-21946.HBASE-21879.v02.patch, HBASE-21946.HBASE-21879.v03.patch,
> HBASE-21946.HBASE-21879.v04.patch
>
>
> [~stakiar] is working on HDFS-3246, so now we have to keep the byte[] pread
> in HFileBlock reading. Once it get resolved, we can upgrade the hadoop
> version and do the replacement.
> I think it will be a great p999 latency improvement in 100% Get case, anyway
> file a issue address this firstly.
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