On Mon, Mar 2, 2009 at 1:22 PM, Romi Verma <romi3rd...@gmail.com> wrote:
> ok, so let me summarize what i understood. > we can form a openais/pacemaker cluster whose nodes span across multiple > sites. these sites can be as close as just adjacent rooms or they can be > across continent also. only problem is in case of communication failure , > openais-pacemaker does not have any solution yet. That's why it is > recommend to have a local cluster ( nodes sharing same rack). > > am i right?? > > Thanks & Regards, > > > On Mon, Mar 2, 2009 at 12:47 PM, Andrew Beekhof <beek...@gmail.com> wrote: > >> On Mon, Mar 2, 2009 at 04:27, Romi Verma <romi3rd...@gmail.com> wrote: >> > Thanks Andrew and Lars, >> > I would like to understand it bit more. , is there any distance >> parameter >> > here? i mean to say suppose i have two nodes in one room and 1 node in >> > adjacent room , cant i form three nodes openais/pacemaker cluster here. >> >> of course. >> i believe the point is that as the distance increases, so does the >> number of switches/telcos involved and therefor the probability of a >> comms failure is between the two sites is quite high. >> as is the latency... >> >> > i was under impression that as far as multicast ip works , nothing >> stops us >> > in forming a cluster. >> > >> > Regrards, >> > >> > >> > On Sat, Feb 28, 2009 at 12:04 AM, Lars Marowsky-Bree <l...@suse.de> >> wrote: >> >> >> >> On 2009-02-27T13:38:02, Romi Verma <romi3rd...@gmail.com> wrote: >> >> >> >> > Thanks for reply Andrew, >> >> > ok, then how openais-pacemaker cluster handles the cluster whose >> nodes >> >> > span >> >> > across multiple sites. >> >> >> >> This is not currently handled. >> >> >> >> But deploying a split-site setup with quorumd never worked either; it >> is >> >> not integrated with fencing, and it is impossible to build a working >> >> split-site cluster with it. This was, I'm afraid to say, only a 40% >> >> implementation of the solution even in heartbeat/CCM land. >> >> >> >> >> >> Having proper split-site support is on the roadmap, as soon as the >> >> openAIS integration stabilizes. >> >> >> >> >> >> Regards, >> >> Lars >> >> >> >> -- >> >> Teamlead Kernel, SuSE Labs, Research and Development >> >> SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg) >> >> "Experience is the name everyone gives to their mistakes." -- Oscar >> Wilde >> >> >> >> >> >> _______________________________________________ >> >> Pacemaker mailing list >> >> Pacemaker@oss.clusterlabs.org >> >> http://oss.clusterlabs.org/mailman/listinfo/pacemaker >> > >> > >> > _______________________________________________ >> > Pacemaker mailing list >> > Pacemaker@oss.clusterlabs.org >> > http://oss.clusterlabs.org/mailman/listinfo/pacemaker >> > >> > >> >> _______________________________________________ >> Pacemaker mailing list >> Pacemaker@oss.clusterlabs.org >> http://oss.clusterlabs.org/mailman/listinfo/pacemaker >> > >
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