posix locking on OCFS2

Richard Sharpe realrichardsharpe at gmail.com
Fri Nov 21 11:28:11 MST 2014

On Fri, Nov 21, 2014 at 5:06 AM, steve <steve at steve-ss.com> wrote:
> On 21/11/14 13:46, Ralph Böhme wrote:
>> You just need a userspace cluster stack:
> OK. So is CTDB a 'Userspace cluster stack'? I don't think it has anything in
> the kernel does it? But, 'stack'? Why stack? Why do we add the word 'stack'
> to so many terms these days? Stack.

Sounds like they are saying you need to run Corosync and their
lock-manager daemon that uses the Closed Process Group abstraction ...

And, upon reading this link:

I find that it says:

"fcntl() locking does not pair at all with dlm locking. So both ocfs2 and gfs2
use a special scheme just for this lock. Both use the ordered messaging
provided by the corosync cluster engine. "

Richard Sharpe

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