On Thu, Jul 26, 2012 at 6:00 PM, Илья Шипицин <[email protected]> wrote: > is "upgradesstables" required upon "update column family with > compression_options" (or "compaction_strategy") ?
It is not required, no. If you change compression_options, the new settings will only apply to newly created sstables. upgradesstables is just a way to force "recreating" all sstables and so to force the new compression settings for existing sstables. If you don't run it, you will have to wait for your "old" sstables to get compacted to be compressed (which might be perfectly fine for you). As for changing compaction_strategy, upgradesstables has no impact whatsoever on that, so there is no reason to run it in that case. -- Sylvain
