IBM Z Processor Resource/Systems Manager Planning Guide Level 01a IBM SB10-7175-01 Note: Before you use this information and the product it supports, read the information in “Safety” on page xiii, Appendix C, “Notices,” on page 197 , and IBM Systems Environmental Notices and User Guide, Z125-5823. This edition, SB10-7175-01a, applies to the IBM Z and IBM LinuxONE servers. This edition replaces SB10-7175-01. There might be a newer version of this document in a PDF file available on Resource Link. Go to http://www.ibm.com/ servers/resourcelink and click Library on the navigation bar. © Copyright International Business Machines Corporation 2019, 2020. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Level 01a Contents Figures................................................................................................................ vii Tables.................................................................................................................. xi Safety.................................................................................................................xiii Safety notices............................................................................................................................................ xiii World trade safety information............................................................................................................xiii Laser safety information............................................................................................................................xiii Laser compliance................................................................................................................................. xiii About this publication..........................................................................................xv What is included in this publication........................................................................................................... xv Related publications..................................................................................................................................xvi z/Architecture.......................................................................................................................................xvi Hardware..............................................................................................................................................xvi Software.............................................................................................................................................. xvii Revisions....................................................................................................................................................xix Accessibility...............................................................................................................................................xix Accessibility features...........................................................................................................................xix Keyboard navigation............................................................................................................................ xix Consult assistive technologies............................................................................................................ xix IBM and accessibility........................................................................................................................... xix How to send your comments.................................................................................................................... xix Chapter 1. Introduction to logical partitions........................................................... 1 Prerequisites for operation..........................................................................................................................1 PR/SM..................................................................................................................................................... 1 Parallel Sysplex support.........................................................................................................................5 Guest coupling simulation......................................................................................................................5 Input/Output Configuration Program (IOCP) support.........................................................................25 Hardware support................................................................................................................................ 25 Operator training.................................................................................................................................. 25 Logical partitions........................................................................................................................................27 Characteristics......................................................................................................................................27 Potential applications...........................................................................................................................29 Compatibility and migration considerations............................................................................................. 29 Device numbers....................................................................................................................................29 Multiple Subchannel Sets (MSS)..........................................................................................................30 Control programs..................................................................................................................................30 CPU IDs and CPU addresses................................................................................................................31 HSA allocation............................................................................................................................................32 TOD clock processing................................................................................................................................ 32 Server Time Protocol not enabled....................................................................................................... 32 Server Time Protocol enabled..............................................................................................................32 Sysplex testing without Server Time Protocol enabled...................................................................... 33 Synchronized Time Source and the coupling facility.......................................................................... 33 STP CTN Split and Merge..................................................................................................................... 33 Extended TOD-clock facility.................................................................................................................33 Clock Comparator on Shared Processors............................................................................................ 34 iii Level 01a Chapter 2. Planning considerations......................................................................35 Planning the I/O configuration.................................................................................................................. 35 Maximum number of logical partitions................................................................................................37 Managing logical paths for FICON channels........................................................................................38 Managing the establishment of logical paths......................................................................................39 Shared channel overview..................................................................................................................... 47 Dynamically managed CHPIDs............................................................................................................ 52 IOCP coding specifications.................................................................................................................. 52 RoCE planning considerations...................................................................................................................62 Coupling facility planning considerations................................................................................................. 63 Test or migration coupling configuration.............................................................................................63 Production coupling facility configuration...........................................................................................63 Internal Coupling Facility (ICF)............................................................................................................64 Asynchronous coupling facility duplexing for lock structures............................................................ 66 System-managed coupling facility structure duplexing..................................................................... 67 Single CPC software availability sysplex............................................................................................. 67 Coupling facility nonvolatility...............................................................................................................68