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https://issues.apache.org/jira/browse/HBASE-17825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16374850#comment-16374850
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Vladimir Rodionov commented on HBASE-17825:
-------------------------------------------

{quote}
How does this change output
{quote}

It does not change output, but it changes output directory structure. It used 
to be flat, now it adds subdirectories for every table:

If we convert WALs for tables T1, T2, T3 the tool will create separate 
directories for each table:

T1/
T2/
T3/

> Backup: further optimizations
> -----------------------------
>
>                 Key: HBASE-17825
>                 URL: https://issues.apache.org/jira/browse/HBASE-17825
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>            Priority: Critical
>              Labels: backup
>             Fix For: 3.0.0
>
>         Attachments: HBASE-17825-v1.patch, HBASE-17825-v2.patch, 
> HBASE-17825-v3.patch, HBASE-17825-v4.patch
>
>
> Some phases of backup and restore can be optimized:
> # WALPlayer support for multiple tables
> # Run DistCp once per all tables during backup/restore
> The eventual goal:
> # 2 M/R jobs per backup/restore



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