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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13164) Optimize S3AFileSystem::deleteUnnecessaryFakeDirectories
Date Thu, 29 Sep 2016 16:21:21 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15533230#comment-15533230
] 

Hudson commented on HADOOP-13164:
---------------------------------

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #10514 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/10514/])
HADOOP-13164 Optimize S3AFileSystem::deleteUnnecessaryFakeDirectories. (stevel: rev ee0c722dc8fb81ec902cd1da5958ce5adb0ab08f)
* (edit) hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/AbstractFSContractTestBase.java
* (edit) hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/Statistic.java
* (edit) hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInstrumentation.java
* (edit) hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java
* (edit) hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/ITestS3AFileOperationCost.java
* (edit) hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/S3ATestUtils.java


> Optimize S3AFileSystem::deleteUnnecessaryFakeDirectories
> --------------------------------------------------------
>
>                 Key: HADOOP-13164
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13164
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs/s3
>    Affects Versions: 2.8.0
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>            Priority: Minor
>             Fix For: 2.9.0
>
>         Attachments: HADOOP-13164-branch-005.patch, HADOOP-13164-branch-2-003.patch,
HADOOP-13164-branch-2-004.patch, HADOOP-13164.branch-2-002.patch, HADOOP-13164.branch-2.WIP.002.patch,
HADOOP-13164.branch-2.WIP.patch
>
>
> https://github.com/apache/hadoop/blob/27c4e90efce04e1b1302f668b5eb22412e00d033/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java#L1224
> deleteUnnecessaryFakeDirectories is invoked in S3AFileSystem during rename and on outputstream
close() to purge any fake directories. Depending on the nesting in the folder structure, it
might take a lot longer time as it invokes getFileStatus multiple times.  Instead, it should
be able to break out of the loop once a non-empty directory is encountered. 



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