On 10/25/2011 07:51 PM, Hai Tao wrote: > > actually what I saw is that both nodes shut down heartbeat, and then > restarted heartbeat
I guess you are using Heartbeat v1 .... without crm but haresources config file? Regards, Andreas -- Need help with Pacemaker? http://www.hastexo.com/now > > > 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
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