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From "Stu Hood (JIRA)" <>
Subject [jira] Updated: (CASSANDRA-629) antientropyservice patchset nearly doubles compaction time
Date Sun, 13 Dec 2009 09:59:18 GMT


Stu Hood updated CASSANDRA-629:

    Attachment: 629-3-notify-neighbors.diff

Also, I noticed that in trunk a node won't broadcast a tree to neighbors unless they requested
it, which means that when a major compaction happens naturally, the tree is wasted. Another
quick patch.

> antientropyservice patchset nearly doubles compaction time
> ----------------------------------------------------------
>                 Key: CASSANDRA-629
>                 URL:
>             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
> 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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