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From "Lior Golan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5862) Switch to adler checksum for sstables
Date Thu, 08 Aug 2013 18:07:47 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13733784#comment-13733784
] 

Lior Golan commented on CASSANDRA-5862:
---------------------------------------

Are you computing the checksum on the data before or after compression? If you are computing
the checksum of the uncompressed data, then it might be useful to switch to checksum the compressed
data (less data to checksum)
                
> Switch to adler checksum for sstables
> -------------------------------------
>
>                 Key: CASSANDRA-5862
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5862
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: T Jake Luciani
>             Fix For: 2.0.1
>
>
> Adler is significantly faster than CRC32: http://java-performance.info/java-crc32-and-adler32/
> (Adler is weaker for short inputs, so we should leave the commitlog alone, as it checksums
each mutation individually.)

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