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]
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=4FBD845B.5030402@inktank.com \
--to=josh.durgin@inktank.com \
--cc=ceph-devel@vger.kernel.org \
--cc=mandell@pistoncloud.com \
/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