Hi Stefan, I doubt that you can apply the term "atomic step" to a switchover of a set of services running on different clusters to a DR site.
What you can do easily is add all of the switchover commands into one big script, that you can run in the disaster case. There are problems though, that are out of control of this solution. There might be start order dependencies. You would have to implement the same mechanism that you use to start your set of applications in the primary DC today. Regards Hartmut On 02/04/10 17:11, Stefan Mueller-Wilken wrote: > Dear all, > > I currently design a multi-tier server infrastructure with a primary and a > secondary line of servers. > > The plan is to build an Open HA cluster for every tier (web, app, db, ...) > with two servers each in fail-over configuration. > > While it is generally okay to switch each cluster pair autonomously (primary > to backup web, primary to backup app ...), I need to switch over the complete > set (primary web, app, db, ...) in one go when upgrading the software. > > Question now is: is there a way to orchestrate the clusters to switch over > consistently, means, if to switch them all over to backup in one atomic step? > And also: is it possible to do so automatically and based on heartbeat or > agent intervention? > > Are resource groups the way to go? > > Thanks > Mobi. > -- Sun Microsystems GmbH Hartmut Streppel Sonnenallee 1 Systems Practice D-85551 Kirchheim-Heimstetten Phone: +49 (0)89 46008 2563 Germany Mobile: +49 (0)172 8919711 http://www.sun.de FAX: +49 (0)89 46008 2572 mailto: hartmut.streppel at sun.com My BLOG: http://blogs.sun.com/Hartmut SAP Infos: http://wikis.sun.com/display/SAPonSun/SAP+on+Sun Sitz der Gesellschaft Sun Microsystems GmbH, Sonnenallee 1, D-85551 Kirchheim-Heimstetten Amtsgericht M?nchen: HRB 161028 Gesch?ftsf?hrer: Thomas Schr?der, Wolfgang Engels Vorsitzender des Aufsichtsrates: Martin H?ring
