Re: A couple of questions on locking library

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On Fri, May 31, 2019 at 03:13:39PM +0800, Shawn Guo wrote:
> Hi David, Zdenek,
> 
> Comparing to stable-2.02 branch, I noticed that there are significant
> changes around locking infrastructure on master branch.  I have a
> couple of questions regarding to these changes.
> 
> 1. I see External Locking support was removed as part of clvmd
> removal. What's the reason for dropping External Locking support?  I'm
> asking because we are investigating the possibility to use hardware
> assisted locking for cluster, in form of External Locking extension.

You could create other multi-host locking mechanisms in lvmlockd.
There are currently two, see lvmlockd-dlm.c and lvmlockd-sanlock.c.
Dave

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