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Date: Mon, 23 Aug 2010 14:49:14 +0100
From: Christine Caulfield <ccaulfie@redhat.com>
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Subject: Re: [linux-lvm] Is there any help for external locking of LVM?
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Hiya

There's no documentation on writing locking plugins but it's fairly 
straightforward, in principle at least ;-)

Have a look at LVM2/lib/locking/no_locking.c and add your custom locking 
parts in there. You DO need to call the lvm libraries parts or nothing 
will happen.

If your locking library is generally useful I hope you will share it 
with the community.

Chrissie


On 23/08/10 05:17, Kirby Zhou wrote:
> I am working for getting a alternative of built-in clustered locking.
> clvmd cannot support large size cluster well, and cannot across VLAN.
> In my opinion, a centralized locking mechanism is more suitable for
> large-scale cluster.
>
> If I just put locking_dir on a NFS volume with locking_type=1, can I use LVM
> to share a storage across machine?
> Or is there any document can guide me to write a new locking plug-in?
>
> Regards,
>     Kirby Zhou
>     from   SOHU-RD   +86-10-6272-8261
>