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https://issues.apache.org/jira/browse/HADOOP-5445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12703444#action_12703444
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dhruba borthakur commented on HADOOP-5445:
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> it is really helpful for a cronjob to come along and cleanup transient
> results that no one is using so that disk space can be recovered.
We have been doing precisely that. We have a cron job (outside of hadoop) to
clean up left-over hdfs files periodically.
> HDFS Tmpreaper
> --------------
>
> Key: HADOOP-5445
> URL: https://issues.apache.org/jira/browse/HADOOP-5445
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Environment: CentOs 4/5, Java 1.5, Hadoop 0.17.3
> Reporter: Michael Andrews
> Priority: Minor
> Fix For: 0.17.3
>
> Attachments: DateDelta.java, TmpReaper.java
>
>
> Java implementation of tmpreaper utility for HDFS. Helps when you expect
> processes to die before they can clean up. I have perl unit tests that can
> be ported over to java or groovy if the hadoop team is interested in this
> utility. One issue is that the unit tests set the modification time of test
> files, which is unsupported in HDFS (as far as I can tell).
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