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From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-456) Need utility for exporting and importing tables
Date Wed, 25 Jul 2012 17:46:34 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13422452#comment-13422452
] 

Keith Turner commented on ACCUMULO-456:
---------------------------------------

The patch depends on a table being in the offline state.  It relies on the user to keep the
table in the offline state while the distcp runs.  I was thinking about a new table state,
call this state FROZEN.  A frozen table can be read, but never written to.  A FROZEN table
can not transition to ONLINE, it can only transition to DELETED.  So a user could clone a
table and then tranistion it to FROZEN instead of OFFLINE.  I like this because it makes the
users intent for a table very clear on a system with many users.  I don't like that it adds
complexity to the system.  If someone brings a table online while the distcp is running, the
distcp may fail which is probably not too big of a deal.
                
> Need utility for exporting and importing tables
> -----------------------------------------------
>
>                 Key: ACCUMULO-456
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-456
>             Project: Accumulo
>          Issue Type: New Feature
>            Reporter: Keith Turner
>            Assignee: Keith Turner
>             Fix For: 1.5.0
>
>         Attachments: ACCUMULO-456-1.txt
>
>
> Need a utility to to export and import tables.  A use case would be export table on cluster
A, distcp to cluter B, import.  

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