Hi Sanjay, You can do rolling patching for Clusterware. For Database and ASM, you can install 10.2.0.1 +10.2.0.4 patch in different home directly. Bring down database and start one instance and run catupgrd.sql Then bring down db again and using srvctl change the ORACLE_HOME in OCR using srvctl command. You will also be required to copy the init*ora and password files in new Oracle home. I think this should fit into your 2-3 hrs window But test this :) Cheers Amit http://askdba.org/weblog/ On Mon, Feb 15, 2010 at 2:37 AM, Sanjay Mishra <smishra_97@xxxxxxxxx> wrote: > Hi > > I had to upgrade one of the 8 Node RAC environment and it is running 5 > Database with ASM and RDBMS with it own Home in 10.2.0.3 on AIX. We have > only 2-3 hrs window and so want to have expert opinion on the following > > 1. If I will upgrade CRS and it suggest at the end of successfull > install to run *root102.sh on all NODES* Can I run on all node in > parallel. It takes 10-15 minutes and so want to save some time. Not clear > if > it affect each other as anyway CRS is down at that time on that node > 2. Can I run the CRS upgrade indiviual on all node at the same time > from few new putty session instead of initiating from one window and > selecting all nodes. The reason is that it will take 15 Minutes to upgrade > on Node 1 and then 15 minutes to copy to other nodes. If there are 7 more > nodes, then it will take 15*7=100+ min. to copy to other nodes. So I f will > run seperately from each nodes, it will be total of 15-20 minutes for > Software and then 15 minutes for root102.sh. > 3. If CRS is upgraded and is down, Can I start the ASM and RDBMS > upgrade at the same time or it will conflict due to /tmp/installer Lock > files or any other issue can come. > > > TIA > Sanjay > >