From: Troels Arvin <troels.arvin@gmail.com>
To: kvm@vger.kernel.org
Subject: Shouldn't cache=none be the default for drives?
Date: Wed, 07 Apr 2010 16:39:41 +0200 [thread overview]
Message-ID: <4BBC992D.3050905@gmail.com> (raw)
Hello,
I'm conducting some performancetests with KVM-virtualized CentOSes. One
thing I noticed is that guest I/O performance seems to be significantly
better for virtio-based block devices ("drive"s) if the cache=none
argument is used. (This was with a rather powerful storage system
backend which is hard to saturate.)
So: Why isn't cache=none be the default for drives?
--
Troels
next reply other threads:[~2010-04-07 14:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-07 14:39 Troels Arvin [this message]
2010-04-07 15:17 ` Shouldn't cache=none be the default for drives? Gordan Bobic
2010-04-08 5:07 ` Thomas Mueller
2010-04-08 6:05 ` Michael Tokarev
2010-04-08 6:09 ` Thomas Mueller
2010-04-08 6:23 ` Thomas Mueller
2010-04-08 10:08 ` Christoph Hellwig
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