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https://issues.apache.org/jira/browse/HBASE-7291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Hsieh updated HBASE-7291:
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Status: Patch Available (was: In Progress)
> Simple Log Roll Snapshot
> ------------------------
>
> Key: HBASE-7291
> URL: https://issues.apache.org/jira/browse/HBASE-7291
> Project: HBase
> Issue Type: Sub-task
> Reporter: Jonathan Hsieh
> Assignee: Jonathan Hsieh
> Attachments: hbase-7291.v1.patch, pre-hbase-7291.v1.patch
>
>
> This snapshot will likely be the cheapest snapshot taking method -- it rolls
> or drops a marker in the hlog when a snapshot request is made. This approach
> can be seen as an improvement upon copytable/export with similar consistency
> guarantees. Specifically, there will be "ragged edges", and happens-before
> relation on clients may not be consistent from a client's point of view but
> it will be useable for many backup for disaster recovery use cases.
> For example:
> If client 1 writes row a to region A and then row b to region B, a client
> happens-before enforcing snapshot would only be allowed to have neither a nor
> b, only a, or both a and b. Having only b should not be possible. This
> outcome would be possible with the log-roll snapshot.
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