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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">At CERN, we use ceph for glance and cinder with Scientific Linux 6. You’ll need a patched QEMU from Inktank to support the cinder
backing store.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">The user survey (<a href="http://www.openstack.org/blog/2013/11/openstack-user-survey-october-2013/">http://www.openstack.org/blog/2013/11/openstack-user-survey-october-2013/</a>)
has the most commonly deployed options for backing store with NFS, Ceph, GlusterFS as the open source solutions and Netapp or EMC for the commercial ones.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Tim<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> Nick Maslov [mailto:azpekt@gmail.com]
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<b>Sent:</b> 17 December 2013 08:17<br>
<b>To:</b> Alvise Dorigo; Razique Mahroua<br>
<b>Cc:</b> openstack-operators@lists.openstack.org<br>
<b>Subject:</b> Re: [Openstack-operators] Advice about distributed FS for glance/nova<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Hi,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Using Ceph here as well. It installs easily, works nicely, integrates with OpenStack modules (Glance, Cinder, Swift) as well.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Cheers,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">NM<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">-- <br>
Nick Maslov<br>
Sent with Airmail<o:p></o:p></span></p>
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<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:#A0A0A8">On November 28, 2013 at 6:43:12 PM, Razique Mahroua (<a href="mailto://razique.mahroua@gmail.com">razique.mahroua@gmail.com</a>) wrote:<o:p></o:p></span></p>
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<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Hi :)<br>
We discussed a lot about that. First and direct answer: you won't find "the best".<o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">It all boils down to:<br>
<strong><span style="font-family:"Helvetica","sans-serif"">1. What you are intend to do</span></strong><br>
<strong><span style="font-family:"Helvetica","sans-serif"">2. What is your current hardware</span></strong><br>
<strong><span style="font-family:"Helvetica","sans-serif"">3. What kind of load you at least expect.</span></strong><o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Here is a first thread:<br>
<a href="http://www.gossamer-threads.com/lists/openstack/dev/24231">http://www.gossamer-threads.com/lists/openstack/dev/24231</a><o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">and another interesting one:<br>
<a href="http://www.gossamer-threads.com/lists/openstack/dev/24231">http://www.gossamer-threads.com/lists/openstack/dev/24231</a><o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">in a nutshell, I myself tested many clustered or shared FS, and they all have their pros and cons.<o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">In my top list, I ended up having:<br>
- MooseFS<br>
- Ceph (but not CephFS)<br>
- ISCSI<o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">only because they happened to work well with my environments, they "did the job"<o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Let us know if you have any specific questions regarding these technologies<o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Razique<br>
On 28 Nov 2013, at 0:44, Alvise Dorigo wrote:<o:p></o:p></span></p>
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<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Hello,<br>
I'm setting up an openstack-based cloud IaaS. Everything is going to be in HA mode.<br>
In particular I'm wondering which would be the best choice for the backend FS to support the storage for glance and nova (i.e. /var/lib/glance/images and /var/lib/nova/instances).<o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">I've read around; there's a number of FS and a lot discussions. The most cited and used seem to be (not only for cloud IaaS):<br>
GlusterFS<br>
LustreFS<br>
CEPH<br>
GPFS<br>
MooseFS<br>
FhGFS<br>
CODA<br>
NFS<br>
AFS<o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">My requirements are:<br>
- extendability (new disk array transparently added without any outage)<br>
- high performance on big files (glance and nova usually manage big files)<br>
- POSIX / mount as a normal filesystem with unique naming space<br>
- easy to install/manage (and supported on RHEL 6.x)<o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Any advice or report on your experience would be very appreciated.<o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Regards,<o:p></o:p></span></p>
<pre><code>Alvise_______________________________________________<o:p></o:p></code></pre>
<pre><o:p> </o:p></pre>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">OpenStack-operators mailing list<br>
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