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From "Sylvain Lebresne (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-2521) Move away from Phantom References for Compaction/Memtable
Date Thu, 21 Jul 2011 08:56:58 GMT


Sylvain Lebresne updated CASSANDRA-2521:

    Attachment: 2521-v5.patch

Attaching v5. It is rebased and now all unit tests are passing. It also adds a few requested
comments and only triggers GC for disk space when that could possibly be useful (i.e, when
mmap is used on a non sun jvm (more precisely, if the mmap "cleaner" is not available)).

Will commmit this based on earlier +1 and on Terje successful testing (thanks a lot for that

> Move away from Phantom References for Compaction/Memtable
> ---------------------------------------------------------
>                 Key: CASSANDRA-2521
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Chris Goffinet
>            Assignee: Sylvain Lebresne
>             Fix For: 1.0
>         Attachments: 0001-Use-reference-counting-to-decide-when-a-sstable-can-.patch,
0001-Use-reference-counting-to-decide-when-a-sstable-can-v2.patch, 0002-Force-unmapping-files-before-deletion-v2.patch,
2521-v3.txt, 2521-v4.txt, 2521-v5.patch
> Let's move to using reference counting instead of relying on GC to be called in StorageService.

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