From: Josh Durgin <josh.durgin@inktank.com>
To: Mandell Degerness <mandell@pistoncloud.com>
Cc: ceph-devel@vger.kernel.org
Subject: Re: write-through cache
Date: Wed, 23 May 2012 17:44:11 -0700 [thread overview]
Message-ID: <4FBD845B.5030402@inktank.com> (raw)
In-Reply-To: <CA+jddaPW1YpHqo667dD6_9ce8iRhQLOX911-dWKT+XRFMR3YGw@mail.gmail.com>
On 05/23/2012 04:44 PM, Mandell Degerness wrote:
> I would like to test the effect of using the new write-through cache
> on RBD volumes mounted to Openstack VMs. What, precisely, are the
> changes I need to make to the volume XML in order to do so?
If your only volumes are rbd, you can append
:rbd_cache=true:rbd_cache_max_dirty=0 to the image name in the volume
xml, so it would include something like
<source protocol="rbd"
name="pool/image:rbd_cache=true:rbd_cache_max_dirty=0">
Josh
prev parent reply other threads:[~2012-05-24 0:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-23 23:44 write-through cache Mandell Degerness
2012-05-24 0:44 ` Josh Durgin [this message]
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