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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-5241) Provide alternate queuing audit logger to reduce logging contention
Date Fri, 20 Mar 2015 13:57:39 GMT

     [ https://issues.apache.org/jira/browse/HDFS-5241?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kihwal Lee updated HDFS-5241:
-----------------------------
    Fix Version/s: 2.3.0

> Provide alternate queuing audit logger to reduce logging contention
> -------------------------------------------------------------------
>
>                 Key: HDFS-5241
>                 URL: https://issues.apache.org/jira/browse/HDFS-5241
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>    Affects Versions: 2.0.0-alpha, 3.0.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>             Fix For: 2.3.0
>
>         Attachments: HDFS-5241.patch, HDFS-5241.patch
>
>
> The default audit logger has extremely poor performance.  The internal synchronization
of log4j causes massive contention between the call handlers (100 by default) which drastically
limits the throughput of the NN.



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