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https://issues.apache.org/jira/browse/PIG-2672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13263874#comment-13263874
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Daniel Dai commented on PIG-2672:
---------------------------------
Yes, this is inline with our observation in HCATALOG-385. Ship a new jar to
hdfs will create a new entry in distributed cache, reuse them will not.
More over, we see issues when there are too many jars in distributed cache
(hadoop also unjar them), we run out of the inode.
+1 for this change.
> 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
>
> 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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