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Posted to common-issues@hadoop.apache.org by "Vinod Kumar Vavilapalli (JIRA)" <ji...@apache.org> on 2018/03/22 05:29:00 UTC
[jira] [Reopened] (HADOOP-15208) DistCp to offer -xtrack
option to save src/dest filesets as alternative to delete()
[ https://issues.apache.org/jira/browse/HADOOP-15208?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vinod Kumar Vavilapalli reopened HADOOP-15208:
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Reopening and closing this instead as a dup of HADOOP-15209 as I can't find any patch for this in 3.1.0 for this JIRA. Revert back if this is incorrect.
> DistCp to offer -xtrack <path> option to save src/dest filesets as alternative to delete()
> ------------------------------------------------------------------------------------------
>
> Key: HADOOP-15208
> URL: https://issues.apache.org/jira/browse/HADOOP-15208
> Project: Hadoop Common
> Issue Type: New Feature
> Components: tools/distcp
> Affects Versions: 2.9.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Fix For: 3.1.0
>
> Attachments: HADOOP-15208-001.patch, HADOOP-15208-002.patch, HADOOP-15208-002.patch, HADOOP-15208-003.patch
>
>
> There are opportunities to improve distcp delete performance and scalability with object stores, but you need to test with production datasets to determine if the optimizations work, don't run out of memory, etc.
> By adding the option to save the sequence files of source, dest listings, people (myself included) can experiment with different strategies before trying to commit one which doesn't scale
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