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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12143) Improve performance of getting and removing inode features
Date Tue, 25 Jul 2017 19:18:01 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16100591#comment-16100591
] 

Hudson commented on HDFS-12143:
-------------------------------

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #12053 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/12053/])
HDFS-12143. Improve performance of getting and removing inode features. (kihwal: rev 1a79dcfc457969d6a6c08ffffe4152fd7638e48a)
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeWithAdditionalFields.java


> Improve performance of getting and removing inode features
> ----------------------------------------------------------
>
>                 Key: HDFS-12143
>                 URL: https://issues.apache.org/jira/browse/HDFS-12143
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>    Affects Versions: 2.8.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>             Fix For: 2.9.0, 3.0.0-beta1, 2.8.3
>
>         Attachments: HDFS-12143.patch
>
>
> Getting a feature uses an iterator which is less performant than an indexed for loop.
 Feature lookups are becoming more prolific so cycles count.
> Removing a feature requires building a string for up to 3 precondition checks.  The worst
case of 3 is the penalty for a successful removal.



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