So do as Kevin suggested: ORACLE_SID=orcl1 - startup ORACLE_SID=orcl2 - startup If you have any issues, please provide the OS and Oracle Version together with the exact statements you run and the error messages. regards, Martin On Mon, Dec 27, 2010 at 11:48, Sandeep Kumar B <sandeep.b@xxxxxxxxxxxxx>wrote: > I need an environment like, RAC database with 2instances, but the server is > same with any virtualization. > Its like, orcl db with orcl1 and orcl2 instances on a single server. >