On Wed, 2011-03-16 at 08:29 +0800, Bill Kenworthy wrote: > On Tue, 2011-03-15 at 15:26 +0000, James wrote: > > Bill Kenworthy <billk <at> iinet.net.au> writes: > > > > > > > I have recently added a WD 2TB green drive to two systems and am finding > > > terrible performance with btrfs on an LVM using these drives. > >
Just some feedback now Ive fixed it. Moved all the valuable data off the lv, dropped the rest and shrunk the vg off the disk. Recreated the partitions using fdisk and restored the lv and btrfs. Only the initial partitioning and the pv were set up specifically 4k aware. As a simple benchmark using dirvish to backup in the same fashion as I was previously, time went from 18-19 minutes down to just over 3 minutes - ~6 time speedup, same times as on older disks using reiserfs. I feel reiserfs is a little faster at this, but not by much and no solid figures as too much has changed. I'm happy! BillK
