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Date: Tue, 14 Dec 2010 08:15:05 -0800
From: Ray Van Dolson <rvandolson@esri.com>
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Subject: Re: [linux-lvm] Shared LVM questions
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On Tue, Dec 14, 2010 at 07:59:19AM -0800, Paolo Smiraglia wrote:
> Hi to every ones...
> 
> 
> I would to setup a LVM build on top of an iSCSI disk shared between
> some nodes which is managed by a Master Node (MN) that sents commands
> to other nodes (N1, N2,...) through SSH.
> 
> I think the cluster extension is not required because a particular
> Logical Volume (LV) is accessed exclusively by one node, and because
> LVM metadata cannot be modified at the same time by multiple nodes.
> 
> One issue is that once a LV is created by a node it cannot be
> activated by another node by executing the command
> 
>   $> lvchange -aey vg/lv01
> 
> and the LV created is a snapshot. The error displayed is
> 
>   Can't change logical volume "lv01"
> 
> 
> 1. In this scenario is CLVMD required?
> 2. Is it possible to activate a LV in another node?
> 
> 
> Thanks in advance for all replies.

I haven't tried this, but you probably would need to release the LVM
from use by node B for node A to activate and use it.

Ray