[Linux-cluster] Minimum requirements for clvm only?

[Jonathan E Brassow]

Patrick can correct me if I'm wrong, but you don't need clvmd at all.   
You could 'tag' your volume groups with the machine name.  No-one would  
be able to manipulate those volume groups except the machine whose tag  
matches.  If it is a virtual machine, it doesn't matter where it goes,  
it will still be able to manipulate the volume group with the  
appropriate tag.

This adds a little complexity to the lvm.conf file - so it's really a  
trade-off in terms of where you put your effort (better understanding  
of lesser-used features of LVM vs. coming up to speed on cluster  
infrastructure).

  brassow

On Nov 17, 2006, at 1:54 PM, Nate Carlson wrote:

> Hey all,
>
> I'm building a new system with shared FC storage primarily to allow  
> Xen virtual machines to be migrated between host systems. I'd like to  
> be able to use LVM or some similar system that allows me to name my  
> own volumes, but don't need shared storage, rgmanager, etc. What are  
> the minimum requirements to just get clvm working? I'm assuming I  
> don't need fence devices and such for this, as those are primarily  
> used to ensure that a system is writing to a filesystem when it's not  
> supposed to? Also, are there any alternatives to clvm that may be  
> better suited for this case?
>
> Thanks!
>
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> -
> | nate carlson | natecars at natecarlson.com | http://www.natecarlson.com  
> |
> |       depriving some poor village of its idiot since 1981             
> |
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