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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11927) If java7, use zip crc
Date Tue, 09 Sep 2014 23:42:29 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14127803#comment-14127803
] 

Andrew Purtell commented on HBASE-11927:
----------------------------------------

I wonder if we could make this pluggable. There are other non-ASF options like Cloudflare's
SSE optimized native gzip (https://github.com/cloudflare/zlib/tree/gcc.amd64)

> If java7, use zip crc
> ---------------------
>
>                 Key: HBASE-11927
>                 URL: https://issues.apache.org/jira/browse/HBASE-11927
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>            Assignee: stack
>             Fix For: 0.99.1
>
>         Attachments: c2021.crc2.svg, c2021.write.2.svg, c2021.zip.svg
>
>
> Up in hadoop they have this change. Let me publish some graphs to show that it makes
a difference (CRC is a massive amount of our CPU usage in my profiling of an upload because
of compacting, flushing, etc.).  We should also make use of native CRCings -- especially the
2.6 HDFS-6865 and ilk -- in hbase but that is another issue for now.



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