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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-5509) MR based copier for copying HFiles (trunk version)
Date Fri, 14 Mar 2014 00:58:44 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5509?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lars Hofhansl resolved HBASE-5509.
----------------------------------

    Resolution: Won't Fix

Note needed, now that we have table snapshots.

> MR based copier for copying HFiles (trunk version)
> --------------------------------------------------
>
>                 Key: HBASE-5509
>                 URL: https://issues.apache.org/jira/browse/HBASE-5509
>             Project: HBase
>          Issue Type: Sub-task
>          Components: documentation, regionserver
>            Reporter: Karthik Ranganathan
>            Assignee: Lars Hofhansl
>         Attachments: 5509-v2.txt, 5509.txt
>
>
> This copier is a modification of the distcp tool in HDFS. It does the following:
> 1. List out all the regions in the HBase cluster for the required table
> 2. Write the above out to a file
> 3. Each mapper 
>    3.1 lists all the HFiles for a given region by querying the regionserver
>    3.2 copies all the HFiles
>    3.3 outputs success if the copy succeeded, failure otherwise. Failed regions are retried
in another loop
> 4. Mappers are placed on nodes which have maximum locality for a given region to speed
up copying



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