Agreed with Greg. I like the way I've heard Tom Kyte phrase it, that RAC is a *scalability amplifier*, just like a real physical amplifier works with a singing voice. If your application scales poorly on a single Oracle instance, then it will scale abysmally on RAC. If it scales well on a single Oracle instance, then it will scale beautifully on RAC. Cary Millsap Method R Corporation http://method-r.com http://carymillsap.blogspot.com On Wed, May 19, 2010 at 5:07 PM, Greg Rahn <greg@xxxxxxxxxxxxxxxxxx> wrote: > I think this can easily be summed up as this: > Scalable applications/designs scale with Oracle RAC. Non-scalable ones do > not. > > Or to put this in a different light: > If an application does not scale on Oracle RAC then it's likely that > it's not scaling as well as it could/should on just a single Oracle > instance. > > On Wed, May 19, 2010 at 12:51 AM, Martin Bach > <development@xxxxxxxxxxxxxxxxx> wrote: > > I also disagree with the statement that developers don't need to > > know RAC-sure, we no longer use block pinging but hey, it's a cluster > > and that requires some specific knowledge _about_ clustering and its > > specific needs. > > -- > Regards, > Greg Rahn > http://structureddata.org > -- > //www.freelists.org/webpage/oracle-l > > >