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From "Jonathan Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7290) Online snapshots
Date Thu, 13 Dec 2012 16:10:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13531133#comment-13531133

Jonathan Hsieh commented on HBASE-7290:

When I say 'restore' in step 4, I am specifically referring to a 'snapshot restore' operation.
 It doesn't necessarily have to happen after a crash.  Suppose a user creates data, snapshots
it, then puts bad data in.  The use wants the old data back so he restores the snapshot (there
is no crash anywhere here). 

While what you suggest is true, (they could restore again), this is unexpected, even in our
weaker consistency model.  If we have a table, have a crash and come back we essentially expect
the table to be essentially the same as before. (without potentially tons of new data appear.

> Online snapshots 
> -----------------
>                 Key: HBASE-7290
>                 URL: https://issues.apache.org/jira/browse/HBASE-7290
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Jonathan Hsieh
> HBASE-6055 will be closed when the offline snapshots pieces get merged with trunk.  This
umbrella issue has all the online snapshot specific patches.  This will get merged once one
of the implementations makes it into trunk.  Other flavors of online snapshots can then be
done as normal patches instead of on a development branch.

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