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From "Jonathan Hsieh (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4552) multi-CF bulk load is not atomic across column families
Date Sun, 23 Oct 2011 16:02:32 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13133677#comment-13133677
] 

Jonathan Hsieh commented on HBASE-4552:
---------------------------------------

One more piece: Mechanism to atomically rollback if a partial failures encountered when attempting
to bulk load multiple families.  

For example, let's say I want to bulk load a region with cfs A, B, C.  I issue a call to an
RS region to atomically bulkload the HFiles.  The RS loads A and B successfully but fails
on C (hdfs failure, or rs goes down, etc).  We should rollback A and B -- if we don't we would
have A and B loaded but not C and have an atomicity violation.  





                
> multi-CF bulk load is not atomic across column families
> -------------------------------------------------------
>
>                 Key: HBASE-4552
>                 URL: https://issues.apache.org/jira/browse/HBASE-4552
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.92.0
>            Reporter: Todd Lipcon
>            Assignee: Jonathan Hsieh
>             Fix For: 0.92.0
>
>
> Currently the bulk load API simply imports one HFile at a time. With multi-column-family
support, this is inappropriate, since different CFs show up separately. Instead, the IPC endpoint
should take a of CF -> HFiles, so we can online them all under a single region-wide lock.

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