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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