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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2014/09/10 01:37:28 UTC

[jira] [Updated] (HBASE-11927) If java7, use zip crc

     [ https://issues.apache.org/jira/browse/HBASE-11927?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

stack updated HBASE-11927:
--------------------------
    Attachment: c2021.crc2.svg

CRC32C might be a bit worse.

> 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
>
>
> 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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