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From "sankalp kohli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7928) Digest queries do not require alder32 checks
Date Fri, 19 Sep 2014 05:00:37 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14139995#comment-14139995
] 

sankalp kohli commented on CASSANDRA-7928:
------------------------------------------

Looks like this should be done as part of 3.0 storage layer rewrite. It is too painful to
pass a boolean down the code. Assigning it back to Jake :)

> Digest queries do not require alder32 checks
> --------------------------------------------
>
>                 Key: CASSANDRA-7928
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7928
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: sankalp kohli
>            Assignee: sankalp kohli
>            Priority: Minor
>              Labels: performance
>             Fix For: 2.1.1
>
>
>  While reading data from sstables, C* does Alder32 checks for any data being read. We
have seen that this causes higher CPU usage while doing kernel profiling. These checks might
not be useful for digest queries as they will have a different digest in case of corruption.

>  



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