we have a client of 11gR1[18.104.22.168] database, now we need to upgrade the database to 11gR2[22.214.171.124]
with RMAN I can take backup of 11gR1 and restore in 11gR2 home possible? please suggest
here by using exp/imp or manual upgrade steps or dbua we can upgrade, but as I said above with RMAN is it possible to upgrade,please suggest.
Pl elaborate on what you mean - how long is the backup taking ? I would suggest you post this as a separate question in the RMAN forum - https://forums.oracle.com/community/developer/english/oracle_database/high_availability/recovery_manager_%28rman%29_2
Yes you can perform a upgrade using RMAN backup and you may increase the speed by using the parallel option in RMAN (assuming you have multiple cores)
But why don't you go with DBUA, I would recommend you to go ahead via this tool, and further more this is what Oracle recommends.