Hi, in order of preference: - OpenVMS - supported flavor of *nix/*nux - Win 64-bit (32-bit is a big "NO!!!" for RAC) IMHO, the platform stability is not a very good argument. More important things are (in arbitrary order): - "quality" of sysadmins. NOTE: Win produced a generation of mouse-clickers/GUIsts, who mistakenly think they understand how their OS works... of course, there are nice exceptions, which only confirm the general rule. - monitoring, tracing, other troubleshooting tools availability. NOTE: I've heard the rumors saying that Oracle has plans to add Sun's dtrace functionality to the server (anybody knowledgeable could comment on this?) - install base (or should I just call it "a number") of mission-critical and/or hugely sized databases NOTE: border cases always demonstrate the OS bottleneck/limitations, which then are (hopefully) walked around/eliminated. My $0.02 HTH -Andrey Robert Freeman wrote: > Anyone want to jump in on their preferred platform for RAC? Personally I > tend to lean towards Linux for stability purposes, but I'd like your > thoughts on why you prefer either platform for RAC. Specifically why > would you avoid windows (other than the fact that it's evil), or would you? > > RF -- //www.freelists.org/webpage/oracle-l