Support deletion of whole region
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Key: HBASE-3109
URL: https://issues.apache.org/jira/browse/HBASE-3109
Project: HBase
Issue Type: New Feature
Reporter: Jeff Zhang
Like the bulk import, bulk deletion would also be useful and efficiency for
users. The following the instruction from stack:
I think you could script it easy enough in TRUNK (I think you need
TRUNK because you can ask it when a region is closed since there is no
synchronous close of regions currently).
1. Close the region (See shell for how to send a close message or look
at HBaseAdmin API doc).
2. While its closing, you may have to disable the region in .META.
(See bin/*.rb scripts for how to mangle .META.). This may not be
necessary IIRC in TRUNK (In 0.20.x, it is necessary to prevent the
region being opened elsewhere when the regionserver reports sucessful
close).
3. Check the regionserver periodically for the closing region. When
its no longer mentioned in online regions, you know its closed.
4. Close the region that falls just after the one you just closed
(Same trick w/ offlining above). Do fixup on meta where you extend
the key scope of this region so that it covers the region just closed
by making its startkey that of the region just closed.
5. Reenable (in 0.20. this would mean flipping region to be enabled
again -- in TRUNK, you might have to explicitly open it on a
regionserver -- would have to check).
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