From: Martin <m_btrfs@ml1.co.uk>
To: linux-btrfs@vger.kernel.org
Subject: raid1 inefficient unbalanced filesystem reads
Date: Fri, 28 Jun 2013 14:59:45 +0100 [thread overview]
Message-ID: <kqk4sc$t5d$1@ger.gmane.org> (raw)
On kernel 3.8.13:
Using two equal performance SATAII HDDs, formatted for btrfs raid1 for
both data and metadata and:
The second disk appears to suffer about x8 the read activity of the
first disk. This causes the second disk to quickly get maxed out whilst
the first disk remains almost idle.
Total writes to the two disks is equal.
This is noticeable for example when running "emerge --sync" or running
compiles on Gentoo.
Is this a known feature/problem or worth looking/checking further?
Regards,
Martin
next reply other threads:[~2013-06-28 14:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-28 13:59 Martin [this message]
2013-06-28 15:34 ` raid1 inefficient unbalanced filesystem reads Josef Bacik
2013-06-28 15:39 ` Hugo Mills
2013-06-28 15:56 ` Duncan
2013-06-28 16:25 ` Martin
2013-06-28 16:55 ` George Mitchell
2013-06-28 17:04 ` Josef Bacik
2013-06-28 17:45 ` Martin
2013-06-29 9:41 ` Russell Coker
2013-06-29 14:04 ` Martin
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