On Fri, Feb 01, 2008 at 01:12:53PM +0100, Michael Schwartzkopff wrote: > Am Freitag, 1. Februar 2008 13:02 schrieb Dejan Muhamedagic: > > 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. > (...) > > 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. > > HA! Even better solution: > 8 virtual machines on 2 physical servers form one cluster. heartbeat in that > cluster can monitor application resources. If one physical machine dies, no > problem.
Looks like split brain to me ;-) > If an application causes trouble: move it onto a machine on the > other physical machine. Constraints will be complex, but with the technique > from "floating peers" from the DRBD HOWTO it should be possible. I must have missed the "floating peers" term. What kind of technology is that? Note that you'll also have a much bigger and slower cluster this way. Take some time to test it properly, preferably using CTS with a near real configuration. Thanks, Dejan > > -- > 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
