From: Hubert Kario <hka@qbs.com.pl>
To: helmut@hullen.de
Cc: linux-btrfs@vger.kernel.org
Subject: Re: Btrfs balance
Date: Thu, 20 Jan 2011 18:46:20 +0100 [thread overview]
Message-ID: <201101201846.20370.hka@qbs.com.pl> (raw)
In-Reply-To: <BeD$lESD1uB@helmut.hullen.de>
On Thursday, January 20, 2011 14:40:00 Helmut Hullen wrote:
> Hallo, Andreas,
>=20
> Du meintest am 20.01.11:
> > Maybe it is a very stupid question but I want to ask it anyway. In
> > general, 'btrfs filesystem balance' takes very long to finish and
> > produces lots of IO. So what are the classical usage scenarios, whe=
n
> > it is (really) worth doing a balance?
>=20
> Here (Kernel 2.6.37, btrfs git Nov. 2010): balancing two disks/
> partitions with 2 and 1.5 TByte needs about 24 hours (CPU 1.5 GHz).
>=20
That's the effect of lots of IO. IMHO it shouldn't take more than 4-8h =
for 1TB=20
7200rpm disks in an otherwise idle system, as such it's rather ineffici=
ent=20
right now.
--=20
Hubert Kario
QBS - Quality Business Software
02-656 Warszawa, ul. Ksawer=F3w 30/85
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next prev parent reply other threads:[~2011-01-20 17:46 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-20 13:07 Btrfs balance Andreas Philipp
2011-01-20 13:39 ` Hugo Mills
[not found] ` <4D384C75.5090202@gmail.com>
2011-01-20 15:09 ` Hugo Mills
2011-01-20 13:40 ` Helmut Hullen
2011-01-20 17:46 ` Hubert Kario [this message]
2011-01-20 21:31 ` Chris Mason
-- strict thread matches above, loose matches on Subject: below --
2011-01-20 14:58 Tomasz Chmielewski
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