MR based copier for copying HFiles (trunk version)
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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: Karthik Ranganathan
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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