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From "Stu Hood (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-629) antientropyservice patchset nearly doubles compaction time
Date Mon, 14 Dec 2009 22:25:18 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-629?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Stu Hood updated CASSANDRA-629:
-------------------------------

    Attachment: 629-4-comment-on-laziness.diff

At Jun's request, add a comment on the lazy calculation of the hashes of inner nodes.

> antientropyservice patchset nearly doubles compaction time
> ----------------------------------------------------------
>
>                 Key: CASSANDRA-629
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-629
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Stu Hood
>             Fix For: 0.5
>
>         Attachments: 629-1-utility-changes.diff, 629-2-use-xor-in-merkletree.diff, 629-3-notify-neighbors.diff,
629-4-comment-on-laziness.diff
>
>
> CompactionsTest goes from 2.9s to 5.7s for me, before/after the 193 patchset.  This is
not an acceptable speed hit for when no repair work is actually being done, assuming it is
representative of "real" compactions.

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