Yes, SCAN is mandatory during software installation and optional afterward. If you DO NOT plan to use it AND not like to create A records in DNS for the installation simply create the scan name with one IP in /etc/hosts on every node in your cluster. The installation will work, but CLUVFY run automatically by OUI at the end of installation will complain !! SCAN is very useful for "dynamic" grids. If you like to use the "old" method: 1. Do not use the SCAN at your clients, leaving the resources running or 2. Stop and disable the SCAN VIP(s) and Listener(s): srvctl stop scan_listener srvctl stop scan sudo srvctl disable scan srvctl disable scan_listener If you decide later to use SCAN you can easily activate it or recreate / change the amount of SCAN VIPs and Listeners. Robert Yong Huang wrote: > Can anybody think of any risk or loss of benefit we haven't thought of? Is > there any way to completely bypass it, not even bothering our DNS admin to > create an entry (one or three A records)? If not during installation, can I > stop the SCAN listener and shutdown its network interface (if I can) and > remove it from OCR? > -- //www.freelists.org/webpage/oracle-l