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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SOLR-3715) improve tlog concurrency
Date Sat, 18 Aug 2012 00:18:38 GMT

     [ https://issues.apache.org/jira/browse/SOLR-3715?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yonik Seeley resolved SOLR-3715.
--------------------------------

       Resolution: Fixed
    Fix Version/s: 4.0

I just committed the fix for the bug introduced by this issue.
http://svn.apache.org/viewvc?view=revision&revision=1374480

                
> improve tlog concurrency
> ------------------------
>
>                 Key: SOLR-3715
>                 URL: https://issues.apache.org/jira/browse/SOLR-3715
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Yonik Seeley
>            Assignee: Yonik Seeley
>             Fix For: 4.0
>
>         Attachments: SOLR-3715.patch
>
>
> Right now log record serialization is synchronized.  We can improve concurrency by serializing
to a ram buffer outside synchronization.  The cost will be RAM usage for buffering, and more
complex concurrency in the tlog itself (i.e. we must ensure that a close does not happen without
flushing all in-RAM buffers)

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