Hi Carel-Jan, Thanks for your valuable input on this. I did try switching roles on a small 9i test database back in 2002, but never really implemented in a real production environment. We have a sound DR solution but never got a chance to test and implement the role transition. Now, we have a one-off requirement to switch roles between primary and the physical standby for couple of days. Anyway, I will test it and will report back the progress/result. Thanks, Senthil. On 10/1/07, Carel-Jan Engel <careljan@xxxxxxxxxx> wrote: > > Hi Senthil, > > Role transition is working very well, generally. I've done and seen this > dozens of times at various sites, varying from Windows, Solaris, Linux to AIX > using all Oracle versions between > 8.1.7 and 10.2. > > The key point is, as you figured already, to test. However, I'd strongly > advise you to test this on a regular basis, say once per month - once per > quarter, and not just now because you are going to use it. You really do > not want to be in a situation where you have to switch or fail over, and > never have tested it. I've seen a site with a multi million dollar DR > 'solution', where the dmgmt didn't want to venture a failover during what > appeared to be a 36 hour outage, because they weren't sure whether they > would be able to fail back. Of course they never wanted to found a full > scale test, as requested by the SA/DBA staff. I see other sites where > switch-overs and failovers are practiced so many time that a real disaster > is a no-brainer. They faiilover in 5-10 minutes, (after verifying the STB > site is OK) before even starting to solve the problem on the primary site, > You wouldn't want an airplane captain to have studying the emergency plans > when the emergency occurs, wouldn't you. That's why they practice this in > simulators. Do the same with your DR environment, otherwise it is useless > and your company might be crashed before you have finished reading the > manuals......... > > Best regards, > > Carel-Jan Engel > > === > If you think education is expensive, try ignorance. (Derek Bok) > === > > > On Sun, 2007-09-30 at 19:59 -0400, Senthil Subramanian wrote: > > Hi All, > > I would like to know if anyone has tried the role transition between > primary and the physical standby in a real production environment. > We have a situation to switch the roles for couple of days. > The database size is about one terabyte, version 10.2.0.3 64-bit on > Solaris 8. > I will be setting up a test bed this coming week. > Any comments, advices, and suggestions are most welcome. > > Regards, > > Senthil. > > >