[
https://issues.apache.org/jira/browse/HDFS-10673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15408539#comment-15408539
]
Hudson commented on HDFS-10673:
-------------------------------
SUCCESS: Integrated in Hadoop-trunk-Commit #10219 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/10219/])
HDFS-10673. Optimize FSPermissionChecker's internal path usage. (kihwal: rev
438a9f047eb6af2a4b916a4f6ef6f68adeab8068)
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSPermission.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INode.java
> Optimize FSPermissionChecker's internal path usage
> --------------------------------------------------
>
> Key: HDFS-10673
> URL: https://issues.apache.org/jira/browse/HDFS-10673
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Fix For: 2.9.0, 3.0.0-alpha2
>
> Attachments: HDFS-10673.1.patch, HDFS-10673.2.patch, HDFS-10673.patch
>
>
> The INodeAttributeProvider and AccessControlEnforcer features degrade
> performance and generate excessive garbage even when neither is used. Main
> issues:
> # A byte[][] of components is unnecessarily created. Each path component
> lookup converts a subrange of the byte[][] to a new String[] - then not used
> by default attribute provider.
> # Subaccess checks are insanely expensive. The full path of every subdir is
> created by walking up the inode tree, creating a INode[], building a string
> by converting each inode's byte[] name to a string, etc. Which will only be
> used if there's an exception.
> The expensive of #1 should only be incurred when using the provider/enforcer
> feature. For #2, paths should be created on-demand for exceptions.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
