I posed this question to one of my favorite WebSphere on zOS people, and got a shaky answer, so I'll float it here. I'm thinking of posting on the WebSphere list, but I think I'll get better traction here!
I was wondering if anyone has done any CPU comparisons between running one's JDBC connections to DB2 on zOS via RRSAF versus DDF (type 4 driver) on the new System z with zAAPs and zIIPs. We're on a few z900s right now, and are trying (oy, what a story) to get a z9bc and z9ec with some zIIPs and zAAPs. As you may know, running with type 2 RRSAF connections is much more efficient than type 4 DDF. However, with the advent of zIIPs, I didn't know if we could get a lower TCO on the z9 if I switched my connections to type 4 to take advantage of the zIIP processors. Assuming that we are running the Java on the zAAPs, how much of the overhead of serialization and deserialization would be running on the specialty engines. I would assume that TCPIP overhead of trucking that data through would be a not- insignificant hit, but in the end would we come out ahead? I am assuming, of course, that by using the type 4 JDBC driver we would be able to take advantage of the zIIPs. If I'm wrong in that assumption, this line of inquiry is moot. If you have any thoughts on this, I'd appreciate hearing them! Thanks, Aaron ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
