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From "Aniket Mokashi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-2672) Optimize the use of DistributedCache
Date Thu, 23 Jan 2014 06:04:37 GMT

    [ https://issues.apache.org/jira/browse/PIG-2672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13879473#comment-13879473
] 

Aniket Mokashi commented on PIG-2672:
-------------------------------------

Hadoop uses following code to get stagingDir
{format}
Path stagingRootDir =
      new Path(conf.get("mapreduce.jobtracker.staging.root.dir",
            "/tmp/hadoop/mapred/staging"));
{format}
which indicates that /user/$user.name may not be available (configured). I can use staging
dir as stagingRootDir + user + "/.pig". Would that work?

> 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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