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https://issues.apache.org/jira/browse/PIG-2672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13879461#comment-13879461
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Aniket Mokashi commented on PIG-2672:
-------------------------------------
Another proposal: We create /tmp/${user.name}/jarcache with 700 and use it as a
user level jarcache. Also, every time a jar is used from jar case we do
fs.setTimes(jarpath, now, now) to update atime, mtime of the jar (to avoid
cleanups).
[~rohini] thoughts?
> Optimize the use of DistributedCache
> ------------------------------------
>
> Key: PIG-2672
> URL: https://issues.apache.org/jira/browse/PIG-2672
> Project: Pig
> Issue Type: Improvement
> Reporter: Rohini Palaniswamy
> Fix For: 0.13.0
>
> Attachments: PIG-2672-5.patch, PIG-2672.patch
>
>
> Pig currently copies jar files to a temporary location in hdfs and then adds
> them to DistributedCache for each job launched. This is inefficient in terms
> of
> * Space - The jars are distributed to task trackers for every job taking
> up lot of local temporary space in tasktrackers.
> * Performance - The jar distribution impacts the job launch time.
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