Does anyone still specify an RSU other than 0 in IEASYSxx, and use the CF STOR command to take storage offline from a z/OS system?
The ability to deconfigure storage from a running MVS system was requirement on the old bipolar MP systems in order to dynamically reconfigure from single image to physically partitioned mode. The bipolar machines have been obsolete for decades, and the CMOS machines never had any concept of physical partitioning. CF STOR can be used on current machines to take storage offline from a running z/OS partition so that it can be reassigned to a different partition, presumably as a manual process for workload balancing reasons, But does anyone really do that? Specifying an RSU other than 0 to describe the amount of storage that can be dynamically taken offline requires that amount of storage to be set aside and not used for common storage fixed pages or long term fixed pages owned by nonswappable address spaces. Managing that separation is a complex process which can reduce system performance and reliability. Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. Poughkeepsie NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
