Hi, On Fri, Feb 01, 2008 at 11:44:16AM +0100, Michael Schwartzkopff wrote: > Hi, > > we want to offer services on 4 servers. These services should be high > available. All services will have very low usage. > > 1) The first plan was to use 8 servers and create 4 HA-clusters. But 8 > servers > doing very little is waste of money. So the next plan was: > > 2) Use 5 servers, build one big cluster and distribute the services in such a > way, that not two services run on the same machine. One spare is left with > this architecture. > > 3) Next plan: Use only two physical servers, create 8 virtual servers, build > one cluster on the physical machines and have heartbeat look for the virtual > machines. But the problem with this setup is that monitoring of the virtual > machines does not look, if the applications on these virtual machines do > really run.
There are hooks in the Xen RA for service monitoring. I've never used that, but it should work. > 4) Next plan: Setup as before, 2 cluster between the two physical machines, 4 > clusters between the 8 virtual machines. Monitoring on the cluster of the > physical machines looks for the health of the virtual machines and monitoring > in the virtual clusters look for the health of the applications. > > My question: What is really the best solution? > Isn't solution 4) far too complex? I'd say yes. > What is your oppinion. Thanks for any answer. Options 2 or 3. Note that you'll probably have higher maintenance costs with option 3 as well as more complex configuration. And lower hardware cost. It's really a matter of preference. I'd probably go with option 2) and reduce the number of nodes if possible. Thanks, Dejan > Sincerely, > -- > Dr. Michael Schwartzkopff > MultiNET Services GmbH > Addresse: Bretonischer Ring 7; 85630 Grasbrunn; Germany > Tel: +49 - 89 - 45 69 11 0 > Fax: +49 - 89 - 45 69 11 21 > mob: +49 - 174 - 343 28 75 > > mail: [EMAIL PROTECTED] > web: www.multinet.de > > Sitz der Gesellschaft: 85630 Grasbrunn > Registergericht: Amtsgericht M?nchen HRB 114375 > Gesch?ftsf?hrer: G?nter Jurgeneit, Hubert Martens > > --- > > PGP Fingerprint: F919 3919 FF12 ED5A 2801 DEA6 AA77 57A4 EDD8 979B > Skype: misch42 > _______________________________________________ > 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
