Jonathan Hsieh created HBASE-7291:
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Summary: 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
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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