From: Bill Kenworthy <billk@iinet.net.au>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Re: terrible performance with btrfs on LVM2 using a WD 2TB green drive
Date: Wed, 23 Mar 2011 09:57:56 +0800 [thread overview]
Message-ID: <1300845476.10437.31.camel@troll> (raw)
In-Reply-To: <1300235366.14376.10.camel@troll>
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
next prev parent reply other threads:[~2011-03-23 1:59 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-15 5:37 [gentoo-user] terrible performance with btrfs on LVM2 using a WD 2TB green drive Bill Kenworthy
2011-03-15 6:50 ` Matthew Marlowe
2011-03-15 10:22 ` William Kenworthy
2011-03-16 8:53 ` Florian Philipp
2011-03-16 11:41 ` Joost Roeleveld
2011-03-15 15:26 ` [gentoo-user] " James
2011-03-15 15:44 ` Volker Armin Hemmann
2011-03-16 0:29 ` Bill Kenworthy
2011-03-16 15:57 ` james
2011-03-23 1:57 ` Bill Kenworthy [this message]
2011-03-16 10:33 ` Helmut Jarausch
2011-03-15 15:45 ` [gentoo-user] " Volker Armin Hemmann
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