No subject

job ?

Dave

On 18 October 2012 08:40, David Morton <davidmorton78 at gmail.com> wrote:

> We're changing our SAN shortly and I'm putting together the procedure /
> config now for the shared storage. This will be based on XFS on top of
> clustered LVM2 via Pacemaker.
>
> I've implemented the exclusive=yes directive on the LVM resources (volume
> groups) but I am still able to mount on both cluster nodes (2 node cluster)
> in my testing environment. I would have thought that this directive would
> prevent multiple mounting / VG activation given that even when there are no
> cluster comms (this is how i create the split brain, and reboot both nodes)
> the storage is available to both nodes ?
>
> What is the recommended way of guaranteeing storage exclusiveness in this
> (albeit unlikely) situation where both nodes think they are running by
> themselves ? I've looked at sdb and sfex but have previously been steered
> away from them.
>
> Dave
>
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
>
>

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Nobody have any words of wisdom gained from years of=A0experience=A0? I&#39=
;m looking at sfex resources configured on a small logical volume in the sa=
me volume group as the main data set at present.<div><br></div><div>From th=
e documentation it reads as this is the correct mechanism for the job ?</di=
v>
<div><br></div><div>Dave<br><br><div class=3D"gmail_quote">On 18 October 20=
12 08:40, David Morton <span dir=3D"ltr">&lt;<a href=3D"mailto:davidmorton7=
8 at gmail.com" target=3D"_blank">davidmorton78 at gmail.com</a>&gt;</span> wrote=
:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">We&#39;re changing our SAN shortly and I&#39=
;m putting together the procedure / config now for the shared storage. This=
 will be based on XFS on top of clustered LVM2 via Pacemaker.<div>
<br></div><div>I&#39;ve implemented the exclusive=3Dyes directive on the LV=
M resources (volume groups) but I am still able to mount on both cluster no=
des (2 node cluster) in my testing environment. I would have thought that t=
his directive would prevent multiple mounting / VG activation given that ev=
en when there are no cluster comms (this is how i create the split brain, a=
nd reboot both nodes) the storage is available to both nodes ?</div>

<div><br></div><div>What is the recommended way of=A0guaranteeing=A0storage=
 exclusiveness in this (albeit unlikely) situation where both nodes think t=
hey are running by themselves ? I&#39;ve looked at sdb and sfex but have pr=
eviously been steered away from them.</div>

<div><br></div><div>Dave</div>
<br>_______________________________________________<br>
Pacemaker mailing list: <a href=3D"mailto:Pacemaker at oss.clusterlabs.org">Pa=
cemaker at oss.clusterlabs.org</a><br>
<a href=3D"http://oss.clusterlabs.org/mailman/listinfo/pacemaker" target=3D=
"_blank">http://oss.clusterlabs.org/mailman/listinfo/pacemaker</a><br>
<br>
Project Home: <a href=3D"http://www.clusterlabs.org" target=3D"_blank">http=
://www.clusterlabs.org</a><br>
Getting started: <a href=3D"http://www.clusterlabs.org/doc/Cluster_from_Scr=
atch.pdf" target=3D"_blank">http://www.clusterlabs.org/doc/Cluster_from_Scr=
atch.pdf</a><br>
Bugs: <a href=3D"http://bugs.clusterlabs.org" target=3D"_blank">http://bugs=
.clusterlabs.org</a><br>
<br></blockquote></div><br></div>

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