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lvmetad
lvmetad runs continuously on the system and maintains an up-to-date cached copy of the system's LVM metadata
Tools query/update this daemon when they need metadata
Tools no longer scan all block devices directly
udev rules trigger the loading of metadata into lvmetad as each new block device appears on the system
- pvscan --cache --major 8 --minor 1
Ignores device filters in lvm.conf – they are handled client-side
Doesn't yet support clusters
Enable with use_lvmetad = 1 in the global section of lvm.conf