Details
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Improvement
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Status: Closed
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Minor
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Resolution: Fixed
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Description
Spawned from comment on HBASE-3998
(snip)
Jean-Daniel Cryans added a comment - 16/Jun/11 18:00
We should also add something about what happens when altering a family that was uncompressed to LZO or GZ, and vice versa. This just came up in the IRC channel: if I enable compression on a column family that was not previously compressed, what is needed to get the existing data in that column family compressed ?
(snip)
I'd suggest putting a new section under Appendix/Compression called something like "Upgrade Considerations" because this could either be compression algorithm upgrades (LZO->new version of LZO), or schema changes (as JD pointed out) where you are changing compression algorithms.