Thanks, and could you please think about my second question. > If I just put locking_dir on a NFS volume with locking_type=1, can I use LVM > to share a storage across machine? I see that file_locking do not provide query_resource function, is it safe for me to do pvmove with NFS based locking file? And what does query_resource should do? Regards Kirby Zhou -----Original Message----- From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] On Behalf Of Christine Caulfield Sent: Monday, August 23, 2010 9:49 PM To: linux-lvm@redhat.com Subject: Re: Is there any help for external locking of LVM? 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 > _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
