[linux-lvm] CLVM Questions

[linux-lvm] CLVM Questions

[Jayson Vantuyl]

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Is it possible to mix clustered LVM and unclustered LVM?  I tried but  
it seemed to have issues.

Also, does anyone know if Gentoo likes it better if you use the CLVM  
package or if you build the LVM package with the clvm USE flag?

-- 
Jayson Vantuyl
Systems Architect
Engine Yard
jvantuyl@engineyard.com



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Re: [linux-lvm] CLVM Questions

[Patrick Caulfield]

Jayson Vantuyl wrote:
> Is it possible to mix clustered LVM and unclustered LVM?  I tried but it
> seemed to have issues.


I'm not sure what you mean here. You either have a cluster or you don't.

If you have clvm on one node on a cluster then it needs to be on ALL nodes of
the cluster - you can't have an isolated node that is also part of the CMAN
cluster.

If what you mean is "can I have a non-clustered Volume Group alongside cluster
volume groups", then the answer is "yes". There is a flag on the VG that
indicates whether it is clustered or not. activated with vgchange -cy,
deactivated with vgchange -cn. You can't mark individual LVs within a VG as
clustered/non-clustered though. That wouldn't make sense.

> Also, does anyone know if Gentoo likes it better if you use the CLVM
> package or if you build the LVM package with the clvm USE flag?
> 


-- 

patrick

Re: [linux-lvm] CLVM Questions

[Jayson Vantuyl]

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On Feb 8, 2007, at 2:53 AM, Patrick Caulfield wrote:
> I'm not sure what you mean here. You either have a cluster or you  
> don't.
Yes.

> If you have clvm on one node on a cluster then it needs to be on  
> ALL nodes of
> the cluster - you can't have an isolated node that is also part of  
> the CMAN
> cluster.
I had kind of figured this out.

> If what you mean is "can I have a non-clustered Volume Group  
> alongside cluster
> volume groups", then the answer is "yes". There is a flag on the VG  
> that
> indicates whether it is clustered or not. activated with vgchange -cy,
> deactivated with vgchange -cn. You can't mark individual LVs within  
> a VG as
> clustered/non-clustered though. That wouldn't make sense.
Well, I think I have a bug to report.  When I create a vg and mark it  
as not clustered, I get locking errors when working with its LVs.

-- 
Jayson Vantuyl
Systems Architect
Engine Yard
jvantuyl@engineyard.com



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