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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-5644) Reduce lock contention in libhdfs global class reference hash table
Date Mon, 09 Dec 2013 18:52:08 GMT

     [ https://issues.apache.org/jira/browse/HDFS-5644?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Colin Patrick McCabe updated HDFS-5644:
---------------------------------------

    Summary: Reduce lock contention in libhdfs global class reference hash table  (was: Reduce
lock contention in libhdfs.)

> Reduce lock contention in libhdfs global class reference hash table
> -------------------------------------------------------------------
>
>                 Key: HDFS-5644
>                 URL: https://issues.apache.org/jira/browse/HDFS-5644
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: libhdfs
>    Affects Versions: 3.0.0, 2.2.0
>            Reporter: Chris Nauroth
>
> libhdfs has a hash table which contains class references.  This hash table is shared
between threads and currently uses a single global lock.  The scope of this issue is to improve
performance of libhdfs by removing this single global lock.



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