Thank you very much for your reply. When I use the heartbeat stack, it takes 3 sec. In the same environment, it takes less than 1 sec with OpenAIS stack. I am using RHEL 5 rpms from Pacemaker and Pacemaker 1.0.4. Did any body measure the time takes from demote to promote on both stacks? I wonder whether other people have the same result or not.
Thanks hj On Tue, Jul 28, 2009 at 2:26 AM, Andrew Beekhof <and...@beekhof.net> wrote: > > > 2. By using co-location constraint, the time takes from demote to promote > is > > around 3 sec(when notify is enabled) and 1 sec (when notify is disabled). > > For mission critical application, I think a downtime of 1 or 3 sec is too > > long. How can I minimize this transition time? > > Its purely down to your network and what the resource is doing during > the promote/demote and notify actions. >
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