This is why I use VMs (even for RAC/clusters)--for testing upgrades, resetting to the old version and repeating until it goes well. On Thu, Nov 6, 2008 at 12:03 PM, Michael Fontana <mfontana@xxxxxxxxxxx>wrote: > Our thought was that we could use nodes (in a test scenario only) running > different versions to practice upgrades and migrations of databases from one > release to the next. > > > > Of course, if this works in practice, it would offer less downtime in > production upgrades, right (similar to staging a single-node upgrade by > installation of software only in advance). > > >