05-08-2014
Ohh...ok. I always thought that LVM is smart enough and can do space reduction in fly (also if reduced LPs contain data).
Both filesystems are busy in < 50% - but looks like data are fragmented across all disks and LVM "lock" data during shrink process.
Is there an option to check if given LP is free or contain filesystem data?
Is there an option to do it online? Play with defrag command?
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