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<div class="moz-cite-prefix">Hi Marco, <br>
<br>
On 26/08/13 10:53, Marco Gabriel - inett GmbH wrote:<br>
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<div class="WordSection1"><span lang="EN-US">has anybody tried to
use OCFS2 or GFS on top of DRBD for a Proxmox VE setup?<o:p></o:p></span>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">What I discovered so
far: <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-family:Symbol" lang="EN-US"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman""> </span></span></span><!--[endif]--><span
lang="EN-US">OCFS2 is not in the kernel, not built-in and
not available as a module.<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-family:Symbol" lang="EN-US"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman""> </span></span></span><!--[endif]--><span
lang="EN-US">GFS2 is in the kernel, but depends on cman
package. Cman .deb package conflicts with Proxmox .deb
packages.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Any ideas or experiences
with such setups on Proxmox? <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">From my point of view,
this sounds like an ideal thing for a two node setup.<o:p></o:p></span></p>
<br>
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<br>
We did test such a setup about 1-2 years ago. What we found was
that:<br>
- REALLY, you have to setup fencing right for cluster filesystems<br>
- DRBD seemed to have troubles back then recovering properly after
both nodes were shut down (ie, because a power outage, rack,
rearrangement, whatever)<br>
<br>
We finally discarded it (were trying active-active configuration)
in-house, we felt it gave us more headaches than the peace-of-mind
potentially gained by a shared-storage HA setup. We didn't have
experience with DRBD so maybe it was us not setting up correctly.<br>
<br>
Yet, we're using it in active-passive configuration in a client,
though. They're quite happy, the only problem happened when both
nodes went down after a cascade of power failures, we had to go
onsite for manual intervention, but it was up and running in 30
minutes, with no data loss.<br>
<br>
My advice is to carefully weight the need for a "shared" storage in
your cluster against the added complexity. Also, is you're writing
from both nodes at the same time, your I/O will suffer a lot.<br>
<br>
Cheers<br>
Eneko<br>
<pre class="moz-signature" cols="72">--
Zuzendari Teknikoa / Director Técnico
Binovo IT Human Project, S.L.
Telf. 943575997
943493611
Astigarraga bidea 2, planta 6 dcha., ofi. 3-2; 20180 Oiartzun (Gipuzkoa)
<a class="moz-txt-link-abbreviated" href="http://www.binovo.es">www.binovo.es</a></pre>
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