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, 16 Mar 2011 08:29:25 +0800 [thread overview]
Message-ID: <1300235366.14376.10.camel@troll> (raw)
In-Reply-To: <loom.20110315T160424-264@post.gmane.org>
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.
>
> Hmmmm, I've been contemplating btrfs on some new installs
> with the eventual goal of a CEPH network file system, on top
> of ext4 and/or btrfs. Is this issue just with the drivers, or
> related to btrfs too?
>
same plan as mine :)
> How is btrfs , from the "driver's seat"?
>
Some early corruption that was due to a failing (old/ancient) HD -
easily fixed using online fsck until I realised it was caused by the
hardware and removed the drive (actually it finally died!). I have had
one instance of a more serious corruption caused by some bug in btrfs
that needed the latest btrfsck from git to fix offline - later kernels
do not suffer from this apparently.
Otherwise I have been hammering it as a dirvish backup server and except
for speed its fine - and I wont be able to confirm that the speed issue
is btrfs's fault until I get the partitioning correct - and dirvish is
somewhat unique in what it does so it could be a special case.
> Does this aberration you detail, extend to the Green Seagate 2T drives?
>
No idea :)
> > I just saw on the mythtv list about the sector size problem these drives
>
> Can you give a precise link to this list or can I follow it (read only)
> via net news? (if so what is the news group name)?
google for adf and 4k sectors
>
> I'd like to read up on this issue, as I have several gentoo installs
> (very soon) that will have RAID1 using (2) ST 2T green drives.
>
> Alternative RAID configs and performance/reliability results is
> also of keen interest to many; so thanks for posting about these
> issues.
>
>
> James
>
>
Read up about raid and the model of green drive you are contemplating -
not all are compatible from what I have read.
Billk
next prev parent reply other threads:[~2011-03-16 0:31 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 [this message]
2011-03-16 15:57 ` james
2011-03-23 1:57 ` Bill Kenworthy
2011-03-16 10:33 ` Helmut Jarausch
2011-03-15 15:45 ` [gentoo-user] " Volker Armin Hemmann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1300235366.14376.10.camel@troll \
--to=billk@iinet.net.au \
--cc=gentoo-user@lists.gentoo.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox