On Wed, Apr 3, 2019 at 10:26 AM Valentin Vidic <[email protected]> wrote: > > On Wed, Apr 03, 2019 at 09:13:58AM +0200, Ulrich Windl wrote: > > I'm surprised: Once sbd writes the fence command, it usually takes > > less than 3 seconds until the victim is dead. If you power off a > > server, the PDU still may have one or two seconds "power reserve", so > > the host may not be down immediately. Besides of that power-cycles are > > additional stress for the hardware... > > > > So maybe you want to explain why and how much faster IPMI and PDU fencing > > are. > > SBD is slow for me too. Since it doesn't have a way to confirm the kill > it needs to wait for various timeouts and these can be quite high. For > example the IBM storage timeouts require this setup: > > Timeout (watchdog) : 130
I assume this is path failover time? As I doubt storage latency can be that high? I wonder, does IBM have official guidelines for integrating SBD with their storage? Otherwise where this requirement comes from? > Timeout (msgwait) : 270 > > On the same cluster IPMI fence executes in a second or two, but requires > network connectivity. _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/
