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