am bit confused, you have an rac and separate application node as of now and now you do not want to have multiple nodes/hosts, instead you want to have one oracle home for database, another for oracle client for application maintenance, sounds good, but is new hardware capabale of accomodating database load and application load as well..if so then 0) who is going to maintain application node..you i.e. dba then why you require oracle client 1) otherwise can you have an VM ware instance on the host and can you move application code to VMware and there you can install oracle client, I thought of this because, like some of list members have already said security can not be guranteed on the same host even if we install database, oracle client and application code with different users. but what about groups.if they are not same then you are compramising with security, and in that case root user and or pseudo user password policies will not be kept secure, especially, if you/dba are not going to maintain the application node, which is on the same host. instead think of VM ware instance where you can give complete access to application team thanks..subodh On 19 January 2011 15:57, Peter Hitchman <pjhoraclel@xxxxxxxxx> wrote: > Hi, > Having over the past couple of years started to work with RAC, where > the application code runs from another server with an Oracle client > install, I am back setting up a single instance where the application > code will run on the > same machine. It occurred to me that it might make sense to still > install an Oracle runtime or instant client for the application to > use, as well as the database install, because that way I could > upgrade one without interfering with the other. On the down side it > means there will be an extra oracle home to maintain and if the > releases are different, I might run into issues with the oraenv/dbhome > programmes. > > What do most people out there do, with single instance set-ups? > > Thanks > Pete > -- > //www.freelists.org/webpage/oracle-l > > > -- ============================== DO NOT FORGET TO SMILE TODAY ==============================