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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-2419) Risk of counter over-count when recovering commit log
Date Tue, 03 May 2011 15:20:03 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-2419?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-2419:
--------------------------------------

    Attachment:     (was: 2419-v5.txt)

> Risk of counter over-count when recovering commit log
> -----------------------------------------------------
>
>                 Key: CASSANDRA-2419
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2419
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.8 beta 1
>            Reporter: Sylvain Lebresne
>            Assignee: Sylvain Lebresne
>              Labels: counters
>             Fix For: 0.8.0
>
>         Attachments: 0001-Record-CL-replay-infos-alongside-sstables-v2.patch, 0001-Record-and-use-sstable-replay-position.patch,
2419-v3.txt, 2419-v4.txt
>
>   Original Estimate: 8h
>  Remaining Estimate: 8h
>
> When a memtable was flush, there is a small delay before the commit log replay position
gets updated. If the node fails during this delay, all the updates of this memtable will be
replay during commit log recovery and will end-up being over-counts.

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