It shouldn't be that slow! Look at your system log and/or run with -vvv to see why it's so slow.
# lvm pvscan -vvv > ~/pvscan-list # grep "Added to device cache" pvscan-list | wc -l 15813
I guess the number of devices to be scanned is just too large (and my computer is also a very slow one). Is there some way to specify a narrower range of devices to be scanned in LVM2?
This kind of patch will definitely help!We've a couple of speed-ups that might help (one uses sysfs to reduce the number of devices to scan) - they're in the queue of things waiting to be checked into CVS after the repository move. I'll try to get them imported tomorrow.
--Ling
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