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From "Christopher Tubbs (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (ACCUMULO-140) Prevent linux from caching write ahead log files
Date Tue, 18 Dec 2012 19:40:12 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Christopher Tubbs resolved ACCUMULO-140.
----------------------------------------

    Resolution: Won't Fix

There are no more loggers.
                
> Prevent linux from caching write ahead log files
> ------------------------------------------------
>
>                 Key: ACCUMULO-140
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-140
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: logger
>            Reporter: Keith Turner
>            Assignee: Eric Newton
>
> While at ApacheCon I attended a talk about Cassandra.  The developer mentioned using
posix_fadvise to prevent linux from storing edit/write ahead log data in the page cache. 
This sounds great.  Accumulo can do this for its write ahead logs.
> Using posix_fadvise was also mentioned for compactions, this is something Accumulo can
not do because its compactions read and write to hdfs.

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