actually what I saw is that both nodes shut down heartbeat, and then restarted heartbeat.
Thanks. Hai Tao > Date: Tue, 25 Oct 2011 10:35:53 -0700 > From: [email protected] > To: [email protected]; [email protected] > Subject: Re: [Linux-HA] what if brain split happens > > On Tue, 25 Oct 2011, Dimitri Maziuk wrote: > > > On 10/24/2011 10:49 PM, Hai Tao wrote: > >> > >> In case heartbeat communication is lost, brain split then happened, both > >> nodes (a two nodes cluster for a simple example) are having the vip and > >> other resources. > >> > >> When the heartbeat commnication comes back, what will happen? > >> > >> 1. both nodes will still having the vip and resources forever? > >> 2. both nodes realize that brain split has happened, and will restart > >> heartbeat? > > > > In theory -- #2 except they shouldn't restart heartbeat, one of them > > should stop the resources. In practice one of the interesting things > > that happen when the comms come back is you have a duplicate ip address > > (vip) on your network. That's not something you want to happen, so you > > better make sure one of the nodes is down before you restore the comms. > > actually, I believe that what happens is that both nodes stop the resouce, > and > then one of the nodes starts it. > > this solves the dup-IP problem because starting the resource re-sends the > appropriate ARP packets to clean up the network. > > David Lang > _______________________________________________ > Linux-HA mailing list > [email protected] > http://lists.linux-ha.org/mailman/listinfo/linux-ha > See also: http://linux-ha.org/ReportingProblems _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
