We cut our production LPAR over from a z14 to a z16 this morning, yay! We did discover one thing the hard way, and it came as a nasty shock.
The z16's IPL Boost feature is a nice thing. It basically unleashes the two zIIPs we have configured (alongside the two CPs on a z16-M02) to do CPU workloads as well. It did make our system come up much quicker. But when the hour was up, the system ended the boost by configuring the two zIIPs completely offline. We didn't discover this until almost three hours later when we realized that no work was getting dispatched on the zIIPs. We recovered by configuring the two zIIPs online. We're an Adabas and Natural shop, and essentially our entire application workload is zIIP eligible and normally runs that way. Not having the zIIPs running would have severely impacted our system's performance. Is there a way to have the system end boost not by taking the zIIPs completely offline, but making them zIIPs again? Or is the best approach here to automate a response to the IEF678I or IWM064I messages to issue the CF CPU command? -- Jay Maynard ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
