Scott Chapman wrote: >A potential issue is that some systems only have a single >zIIP.... My personal belief is that given the amount of work >that's zIIP eligible today, most systems should have at least >2 zIIPs....
I would add an important footnote. The current and prior model machine generations have zIIP engines that are capable of simultaneous multithreading (SMT). To a first order approximation anyway, one zIIP now behaves like two when SMT is enabled. Even if you have one zIIP, enabling SMT2 could be a reasonable way to get the "rule of thumb pair" you describe. SMT2 support for zIIPs is available in z/OS 2.1 and higher on IBM z13 machines. Please refer to APARs OA43622 and OA43366. -------------------------------------------------------------------------------------------------------- Timothy Sipples IT Architect Executive, Industry Solutions, IBM Z & LinuxONE, Multi-Geography E-Mail: sipp...@sg.ibm.com ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
