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https://issues.apache.org/jira/browse/HBASE-5509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13221796#comment-13221796
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Lars Hofhansl commented on HBASE-5509:
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bq. For getStoreFileList():{code}
+ * @param families
+ * a comma separated list of column families for which we need to
{code} I think List<String> may be better data type for families parameter.
This would make this method more general in that
Families is taken from the command line; it might be (1) an indicator for all
CFs, or (2) a list of specific CFs. In the former case we cannot get the list
of CFs before we know the RegionServer, which only happens later.
Again, this is not my code. I can refactor and have extra command line flags
and extra code for this.
> 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
> Fix For: 0.94.0, 0.96.0
>
> Attachments: 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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