BTRFS snapshot performance - disk vs SSD

btrfs subvol snapshot -r /home /home/backup/$(date +%Y-%m-%d:%H:%M) The above command takes more than 10 seconds on a system with an Intel 120G SSD but less than 1 second on a system with a hard disk identified as "HITACHI HTS72201 DC2Z". Also I've noticed that every system which uses BTRFS on an Intel 120G SSD gives very poor performance when installing Debian packages (which calls sync()). I'm using the ssd and discard mount options. Does the Intel SSD just suck for the type of writes that BTRFS does when synchronising things or is there some way of tweaking it for performance? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/