Daryn Sharp created HDFS-10616:
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Summary: Improve performance of path handling
Key: HDFS-10616
URL: https://issues.apache.org/jira/browse/HDFS-10616
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs
Affects Versions: 2.0.0-alpha
Reporter: Daryn Sharp
Assignee: Daryn Sharp
Path handling in the namesystem and directory is very inefficient. The path is
repeatedly resolved, decomposed into path components, recombined to a full
path. parsed again, throughout the system. This is directly inefficient for
general performance, and indirectly via unnecessary pressure on young gen GC.
The namesystem should only operate on paths, parse it once into inodes, and the
directory should only operate on inodes.
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