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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11446) Reduce the frequency of RNG calls in SecureWALCellCodec#EncryptedKvEncoder
Date Tue, 01 Jul 2014 18:30:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14049162#comment-14049162
] 

Andrew Purtell commented on HBASE-11446:
----------------------------------------

Any concerns about this [~hitliuyi] ?

> Reduce the frequency of RNG calls in SecureWALCellCodec#EncryptedKvEncoder
> --------------------------------------------------------------------------
>
>                 Key: HBASE-11446
>                 URL: https://issues.apache.org/jira/browse/HBASE-11446
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>             Fix For: 0.99.0, 0.98.4
>
>         Attachments: HBASE-11446.patch
>
>
> By reducing the frequency of RNG calls in SecureWALCellCodec#EncryptedKvEncoder we can
save 37% of on CPU time in that method and 3% of total on CPU time during an ingest test.
WAL processing is a critical latency sensitive area.



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