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Posted to hdfs-dev@hadoop.apache.org by "Suresh Srinivas (JIRA)" <ji...@apache.org> on 2010/04/26 20:43:32 UTC

[jira] Created: (HDFS-1110) Namenode heap optimization - reuse objects for commonly used file names

Namenode heap optimization - reuse objects for commonly used file names
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                 Key: HDFS-1110
                 URL: https://issues.apache.org/jira/browse/HDFS-1110
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Suresh Srinivas
            Assignee: Suresh Srinivas
             Fix For: 0.22.0


There are a lot of common file names used in HDFS, mainly created by mapreduce, such as file names starting with "part". Reusing byte[] corresponding to these recurring file names will save significant heap space used for storing the file names in millions of INodeFile objects.


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