[jira] [Created] (HDFS-6585) INodesInPath.resolve is called multiple times in FSNamesystem.setPermission

["Zhilei Xu (JIRA)" <ji...@apache.org>]

Zhilei Xu created HDFS-6585:
-------------------------------

             Summary: INodesInPath.resolve is called multiple times in FSNamesystem.setPermission
                 Key: HDFS-6585
                 URL: https://issues.apache.org/jira/browse/HDFS-6585
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: namenode
            Reporter: Zhilei Xu
            Assignee: Zhilei Xu
         Attachments: patch_ab60af58e03b323dd4b18d32c4def1f008b98822.txt

Most of the APIs (both internal and external) in FSNamesystem calls INodesInPath.resolve() to get the list of INodes corresponding to a file path. Usually one API will call resolve() multiple times and that's a waste of time.

This issue particularly refers to FSNamesystem.setPermission, which calls resolve() twice indirectly: one from checkOwner(), another from dir.setPermission().

Should save the result of resolve(), and use it whenever possible throughout the lifetime of an API call, instead of making new resolve() calls.



--
This message was sent by Atlassian JIRA
(v6.2#6252)