DOCSLIB.ORG

PR/SM Planning Guide Operational Considerations

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
PR/SM Planning Guide Operational Considerations IBM IBM Z Processor Resource/Systems Manager Planning Guide SB10-7169-02 Level 02a IBM IBM Z Processor Resource/Systems Manager Planning Guide SB10-7169-02 Note: Before you use this information and the product it supports, read the information in “Safety” on page xi, Appendix C, “Notices,” on page 199, and IBM Systems Environmental Notices and User Guide, Z125-5823. This edition, SB10-7169-02, applies to the IBM Z and IBM LinuxONE servers. This edition replaces SB10-7169-01. There might be a newer version of this document in a PDF file available on Resource Link.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 IBM Corporation 2017, 2019. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Figures .............. vii Extended TOD-clock facility ........ 26 Clock Comparator on Shared Processors.... 27 Tables ............... ix Chapter 2. Planning considerations .. 29 Safety ............... xi Planning the I/O configuration ........ 29 Maximum number of logical partitions .... 31 Safety notices .............. xi Managing logical paths for FICON channels .. 31 World trade safety information ....... xi Managing the establishment of logical paths .. 33 Laser safety information .......... xi Shared channel overview ......... 42 Laser compliance ............ xi Unshared ESCON or FICON channel recommendations ........... 48 About this publication ........ xiii Dynamically managed CHPIDs....... 48 What is included in this publication ...... xiii IOCP coding specifications ........ 49 Related publications ........... xiv 25GbE RoCE Express2 planning considerations .. 58 z/Architecture ............ xiv 10Gb RoCE planning considerations ...... 58 Enterprise Systems Architecture/390 (ESA/390) xiv Coupling facility planning considerations .... 59 Hardware.............. xiv Test or migration coupling configuration ... 59 Software .............. xv Production coupling facility configuration ... 60 Accessibility .............. xvi Internal Coupling Facility (ICF)....... 60 Accessibility features .......... xvi Asynchronous coupling facility duplexing for Keyboard navigation .......... xvii lock structures ............ 63 Consult assistive technologies ....... xvii System-managed coupling facility structure IBM and accessibility.......... xvii duplexing .............. 63 Revisions .............. xvii Single CPC software availability sysplex.... 64 How to send your comments ........ xvii Coupling facility nonvolatility ....... 64 Coupling facility mode setting ....... 65 Summary of changes ........ xix Coupling facility LP definition considerations .. 65 Coupling facility LP storage planning Chapter 1. Introduction to logical considerations ............ 65 partitions .............. 1 Dump space allocation in a coupling facility .. 67 Coupling facility LP activation considerations .. 67 Prerequisites for operation .......... 1 Coupling facility shutdown considerations ... 67 PR/SM ............... 1 Coupling facility LP operation considerations .. 68 Parallel Sysplex support ......... 4 Coupling facility control code commands ... 68 Guest coupling simulation ......... 5 Coupling facility level (CFLEVEL) considerations 68 Input/Output Configuration Program (IOCP) Coupling Facility Resource Management (CFRM) support............... 19 policy considerations .......... 72 Hardware support ........... 19 Coupling facility channels ........ 73 Operator training ........... 19 Linux operating system planning considerations .. 78 Logical partitions ............ 20 Integrated Facility for Linux (IFL) ...... 78 Characteristics ............ 20 z/VM utilizing IFL features ........ 78 Potential applications .......... 21 IBM Secure Service Container planning Compatibility and migration considerations ... 22 considerations ............. 78 Device numbers ............ 22 IBM z Integrated Information Processor (zIIP) ... 79 Multiple Subchannel Sets (MSS) ...... 23 Concurrent patch ............ 80 Control programs ........... 23 Dynamic capacity upgrade on demand ..... 80 CPU IDs and CPU addresses ....... 24 PR/SM shared partitions ......... 81 HSA allocation ............. 25 Mixed shared and dedicated PR/SM partitions 81 TOD clock processing ........... 25 Multiple dedicated PR/SM partitions..... 82 Server Time Protocol not enabled ...... 25 Shared Internal Coupling Facility ...... 82 Server Time Protocol enabled ....... 25 Dynamic capacity upgrade on demand limitations 83 Sysplex testing without Server Time Protocol Concurrent Memory Upgrade ........ 83 enabled............... 26 Capacity Backup Upgrade (CBU) capability ... 83 Synchronized Time Source and the coupling Enhanced Processor Drawer Availability ..... 84 facility ............... 26 STP CTN Split and Merge ........ 26 © Copyright IBM Corp. 2017, 2019 iii Preparing for Enhanced Processor Drawer Changing logical partition definitions ..... 158 Availability ............. 84 Changes available dynamically to a running LP 158 Customer Initiated Upgrade (CIU)....... 86 Changes available at the next LP activation .. 159 Concurrent Processor Unit conversion ..... 86 Changes available at the next Power-On Reset Planning for nondisruptive install of crypto features 86 (POR) ............... 160 Chapter 3. Determining the Chapter 4. Operating logical partitions 161 characteristics of logical partitions .. 89 Operator controls ............ 161 Performance considerations ......... 89 Editing activation profiles ......... 163 Recovery considerations .......... 90 Activating a CPC ............ 164 Determining the characteristics ........ 90 Activating an LP ............ 164 Control program support ......... 90 Performing a load on an LP or activating a load IOCDS requirements .......... 91 profile ................ 164 Logical partition identifier ........ 91 Deactivating a logical partition ....... 164 Mode of operation ........... 91 Locking and unlocking an logical partition ... 164 Storage configurations .......... 91 Deactivating a CPC ........... 164 Central storage ............ 92 IBM Virtual Flash Memory ........ 94 Chapter 5. Monitoring the activities of IBM Adapter for NVMe (LinuxONE only) ... 95 logical partitions .......... 165 Dynamic storage reconfiguration ...... 95 Reviewing current storage information ..... 165 Number of central processors ....... 101 Reviewing partition resource assignments .... 165 Processor considerations for Linux-only LPs .. 103 Reviewing and changing current logical partition Processor considerations for coupling facility controls ............... 166 LPs................ 103 Reviewing status of Simultaneous Multi-Threading Processor considerations for z/VM mode LPs 106 (SMT) ................ 167 Processor considerations for LPs with multiple Reviewing and adding logical processors .... 168 CP types .............. 107 Reviewing and changing current logical partition Dedicated central processors ....... 107 group controls ............. 169 Shared central processors ........ 107 Reviewing and changing current logical partition Enforcement of processing weights ..... 110 security ............... 171 Defining shared channel paths....... 120 Reviewing and changing current logical partition Dynamic CHPID management (DCM) cryptographic controls .......... 172 considerations ............ 122 Changing LPAR cryptographic controls.... 173 I/O priority recommendations....... 122 Cryptographic configuration ....... 176 Security-related controls ......... 122 Reviewing and changing logical partition I/O Dynamic I/O configuration........ 124 priority values ............. 179 Assigning channel paths to a logical partition 126 Logical partition performance ........ 180 Automatic load for a logical partition .... 127 RMF LPAR management time reporting ... 180 Defining logical partitions ......... 128 Dedicated and shared central processors ... 181 Global reset profile definitions....... 130 CPENABLE ............. 182 General .............. 131 Start Interpretive Execution (SIE) performance 182 Security characteristics ......... 138 Recovery strategy ............ 182 Establishing optional characteristics ..... 141 Operation considerations ........ 182 Storage characteristics ......... 142 Application preservation ........ 183 Establishing Secure Service Container parameter Transparent sparing .......... 183 descriptions ............. 143 Load information ........... 145 Appendix A. Coupling facility control Cryptographic characteristics ....... 147 Creating a logical partition group profile ... 154 code support ........... 185 Enabling Input/Output priority queuing ... 155 Legend ............... 185 Changing logical partition Input/Output priority queuing values ......... 155 Appendix B. Developing, building, and Moving unshared channel paths ....... 157 delivering a certified system ..... 187 Moving unshared channel paths from a z/OS Creating Common Criteria-Based evaluations... 187 system .............. 157 Functional characteristics ......... 188 Moving a channel path from the hardware Trusted configuration........... 188 console .............. 157 PR/SM characteristics .......... 190 Releasing reconfigurable channel paths .... 157 Central storage ............. 191 Configuring shared channel paths ...... 157 I/O security considerations......... 191 Deconfiguring shared channel paths...... 158 IOCDS considerations ......... 191 Removing shared channel paths for service .. 158 iv PR/SM Planning Guide Operational considerations ........ 192 Appendix C. Notices .......
Load more

Recommended publications
  • Introduction to Virtualization
    z Systems Introduction to Virtualization SHARE Orlando Linux and VM Program Romney White, IBM [email protected] z Systems Architecture and Technology © 2015 IBM Corporation Agenda ° Introduction to Virtualization – Concept – Server Virtualization Approaches – Hypervisor Implementation Methods – Why Virtualization Matters ° Virtualization on z Systems – Logical Partitions – Virtual Machines 2 z Systems Virtualization Technology © 2015 IBM Corporation Virtualization Concept Virtual Resources Proxies for real resources: same interfaces/functions, different attributes May be part of a physical resource or multiple physical resources Virtualization Creates virtual resources and "maps" them to real resources Primarily accomplished with software or firmware Resources Components with architecturally-defined interfaces/functions May be centralized or distributed - usually physical Examples: memory, disk drives, networks, servers Separates presentation of resources to users from actual resources Aggregates pools of resources for allocation to users as virtual resources 3 z Systems Virtualization Technology © 2015 IBM Corporation Server Virtualization Approaches Hardware Partitioning Bare-metal Hypervisor Hosted Hypervisor Apps ... Apps Apps ... Apps Apps ... Apps OS OS OS OS OS OS Adjustable partitions Hypervisor Hypervisor Partition Controller Host OS SMP Server SMP Server SMP Server Server is subdivided into fractions Hypervisor provides fine-grained Hypervisor uses OS services to each of which can run an OS timesharing of all resources
    [Show full text]
  • Logical Partitioning
    Power Systems Logical partitioning Power Systems Logical partitioning Note Before using this information and the product it supports, read the information in “Notices” on page 233. This edition applies to IBM AIX Version 6.1, to IBM AIX 5L™ Version 5.3, to IBM i 6.1 (product number 5722-SS1) , to IBM Virtual I/O Server version 2.1.2.0, and to all subsequent releases and modifications until otherwise indicated in new editions. This version does not run on all reduced instruction set computer (RISC) models nor does it run on CISC models. © Copyright IBM Corporation 2007, 2009. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Logical partitioning ...............................1 What's new in Logical partitioning ............................1 Logical partition overview ...............................2 Benefits of logical partitioning ............................2 Sharing resources between logical partitions ........................3 Managed systems.................................5 Manufacturing default configuration ..........................5 Logical partitioning tools ..............................6 Hardware Management Console ...........................6 Partition profile ...............................7 System profile ...............................11 Partitioning with the Integrated Virtualization Manager ..................11 Virtual Partition Manager.............................13 Physical and virtual hardware resources .........................14
    [Show full text]
  • IIP (System Z9 Integrated Information Processor) Computer CEC (Central Electronics Complex) Server
    IBM System z z/VM Basics Arwed Tschoeke Systems Architect [email protected] © 2009 IBM Corporation © 2008 IBM Corporation Introduction We'll explain basic concepts of System z: – Terminology – Processors – Memory – I/O – Networking We'll see that z/VM virtualizes a System z machine: – Virtual processors – Virtual memory – … and so on Where appropriate, we'll compare or contrast: – PR/SM or LPAR – z/OS – Linux 2 z/VM: The Very Basics z/VM: The Very Basics 1 IBM System z © 2008 IBM Corporation System z Parts Nomenclature x86, UNIX, etc. System z Memory Storage (though we are moving toward "memory") Disk, Storage DASD – Direct Access Storage Device Processor Processor, Engine, PU (processing unit) IOP (I/O processor) CPU (central processing unit) CP (central processor) SAP (system assist processor) Specialty engines –IFL (Integrated Facility for Linux) –zAAP (System z Application Assist Processor) –zIIP (System z9 Integrated Information Processor) Computer CEC (central electronics complex) Server 3 z/VM: The Very Basics © 2008 IBM Corporation IBM System z Virtualization Genetics Over 40 years of continuous innovation in virtualization – Refined to support modern business requirements System z10 . – Exploit hardware technology for economical growth , .. ity System z9 z/VM V5 bil – LPAR, Integrated Facility for Linux, HiperSockets xi 64-Bit Fle – System z Application Assist Processors s, zSeries es VM/ESA Virtual Switch – System z Information Integration stn 9672 bu ESA Guest LANs Set Observer Ro Processors y, 9x21 ilit VM/XA Virtual Machine
    [Show full text]
  • Let's Build a Z Environment
    Let’s Build a z Environment - 101 z/OS Session 23330 Tuesday, August 14 at 10:00-11:00 AM STL CC, Room 242 Presented by Paul R. Robichaux NewEra Software, Inc. [email protected] 1 Abstract – Let’s Build a z Environment! The two presentations in this series focus on the building of a z Environment – Hardware, Software, Security – with the goal of establishing a ‘Trusted Computing Base’. A z/OS System that can provide the reliability needed to meet demanding service levels, integrity and security objectives. All are necessary to execute mission critical applications. This is Intended for those new to z Systems or just beginning their careers with organizations that capitalize on systems anchored to the power and reliability of the IBM Mainframe. In – 101 – the focus will be on the platform, in this case a z14, hardware divisions of the Central Processing Complex (CEC), its various channel pathways and related devices that define a UCW (Unit Control Work), the front half of the z System Device Chain. This segment continues with the definition of an associated Operating System configuration, its various I/O devices and related features that define a UCB (Unit Control Block), the back half of the z System Device. Detailing both the Power-On and IPL process will join UCWs and UCBs to form a fully addressable device across which data (encrypted or not) may flow to and from the CEC. In – 102 – the focus will shift to a discussion of Multiple Virtual Storage (MVS), what is z/OS, how to get it, install it, support it and upgrade/migrate from release to release.
    [Show full text]
  • Systems Management Logical Partitions Version 6 Release 1
    IBM System i Systems management Logical partitions Version 6 Release 1 IBM System i Systems management Logical partitions Version 6 Release 1 Note Before using this information and the product it supports, read the information in “Notices,” on page 135. This edition applies to version 6, release 1, modification 0 of and IBM i5/OS (product number 5761–SS1) to all subsequent releases and modifications until otherwise indicated in new editions. This version does not run on all reduced instruction set computer (RISC) models nor does it run on CISC models. © Copyright IBM Corporation 1999, 2008. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Logical partitions........... 1 Ordering a new server or upgrading an PDF file for Logical partitions ........ 1 existing server with logical partitions .... 45 Partitioning with a System i ......... 1 Providing hardware placement information Logical partition concepts ......... 1 to service providers......... 45 How logical partitioning works ...... 2 Designing your logical partitions ..... 46 How logical partitioning can work for you .. 3 Deciding what runs in the primary and Hardware for logical partitions ...... 4 secondary partition ......... 46 Bus .............. 5 Capacity planning for logical partitions .. 47 Bus-level and IOP-level I/O partitions ... 7 Using the System Planning Tool .... 47 Dynamically switching IOPs between Examples: Logical partitioning ...... 47 partitions ............ 7 Creating logical partitions ........ 48 IOP .............. 9 Managing logical partitions ........ 49 SPD and PCI ........... 11 Managing logical partitions by using System i Processor ............ 11 Navigator, DST, and SST ........ 50 Memory ............ 14 Starting System i Navigator ...... 53 Disk units ............ 15 Starting SST and DST for logical partitions 53 Removable media device and alternate Logical partition authority .....
    [Show full text]
  • Logical Partitioning Feature of CB Series Xeon Servers Suitable for Robust and Reliable Cloud
    Hitachi Review Vol. 61 (2012), No. 2 65 Logical Partitioning Feature of CB Series Xeon Servers Suitable for Robust and Reliable Cloud Hitoshi Ueno, Ph. D., PE.jp OVERVIEW: LPAR is Hitachi’s own server virtualization feature for Shinichi Matsumura Hitachi Compute Blade servers. LPAR stands for logical partitioning used by mission-critical systems such as mainframes and offers excellent performance, including reliability, stability, and maintaining virtual server separation. The implementation of logical partitioning on Xeon*1 servers significantly expands the scope for applying virtualization in private clouds because it means that virtualization of mission-critical systems can be used even on Xeon servers. Hitachi is currently developing new solutions that improve ease-of-operation and simplify installation, and the number of sites using LPAR for cloud is increasing. LPAR is already a proven virtualization feature and Hitachi intends to continue with development to make further improvements in performance and reliability. INTRODUCTION is that, compared to the VM (virtual machine) method, HITACHI aims to create new value through its next it is easier to configure systems with higher reliability generation of IT (information technology) platforms and performance. However, very few virtualization and virtualization is a key technology for implementing products support the use of logical partitioning on the infrastructure clouds that will support this Xeon processors and other Xeon servers (see Table 1). endeavor. Within this, Hitachi Compute Blade (CB) Virtualization based on logical partitioning has logical partitioning feature (LPAR) provides a server been widely used for mission-critical applications virtualization feature critical to data processing. in the past and, unlike virtualization software from This article describes the characteristics of the other vendors, Hitachi’s LPAR feature also extends LPAR, a server virtualization feature that enhances this capability to Xeon servers.
    [Show full text]
  • PR/SM Planning Guide Level 01A
    zEnterprise System Processor Resource/Systems Manager Planning Guide SB10-7155-01 Level 01a zEnterprise System Processor Resource/Systems Manager Planning Guide SB10-7155-01 Level 01a Level 01a Note Before using this information and the product it supports, read the information in “Safety” on page xi, Appendix D, “Notices,” on page 217, and IBM Systems Environmental Notices and User Guide, Z125-5823. This edition, SB10-7155-01, applies to the IBM zEnterprise 196 and zEnterprise 114 servers. This edition replaces SB10-7155-00. There might be a newer version of this document in a PDF file available on Resource Link.Goto http://www.ibm.com/servers/resourcelink and click Library on the navigation bar. A newer version is indicated by a lowercase, alphabetic letter following the form number suffix (for example: 00a, 00b, 01a, 01b). © Copyright IBM Corporation 2010, 2011. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Level 01a Contents Figures ..............vii Chapter 2. Planning considerations . 31 Overview ...............33 Tables ...............ix Planning the I/O configuration ........33 Planning considerations .........33 Safety ...............xi Maximum number of logical partitions ....35 Managing logical paths for ESCON and FICON Safety notices ..............xi channels ..............36 World trade safety information .......xi Managing the establishment of logical paths . 40 Laser safety information ..........xi Shared channel overview .........49 Laser compliance ...........xi Unshared ESCON or FICON channel recommendations ...........55 About this publication ........xiii Dynamically managed CHPIDs.......55 What is included in this publication ......xiv IOCP coding specifications ........56 Related publications ...........xv Coupling facility planning considerations ....66 z/Architecture ............xv Test or migration coupling configuration .
    [Show full text]
  • Introduction to the System Z Hardware Management Console
    Front cover Introduction to the System z Hardware Management Console Large scale hardware systems management concepts Design and implementation of a management controller Practical operational techniques and scenarios Merwyn Jones HMC & SE Development Team ibm.com/redbooks International Technical Support Organization Introduction to the System z Hardware Management Console February 2010 SG24-7748-00 Note: Before using this information and the product it supports, read the information in “Notices” on page xi. First Edition (February 2010) © Copyright International Business Machines Corporation 2010. All rights reserved. Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Notices . xi Trademarks . xii Preface . xiii The team who wrote this book . xiii Acknowledgements . xvi Become a published author . xvi Comments welcome. xvi Chapter 1. Introduction to System z Hardware. 1 1.1 General introduction: Mainframes in our midst . 2 1.2 System z hardware architecture . 3 1.2.1 Consolidation of mainframes . 3 1.2.2 An overview of the early architectures . 4 1.2.3 Early system design . 5 1.2.4 Current architecture . 7 1.3 The raised floor . 7 1.4 Hardware management console . 9 1.5 Frames and cages . 9 1.6 Processor units . 10 1.6.1 Multiprocessors. 10 1.6.2 Processor types . 11 1.7 Memory hierarchy . 13 1.8 Networking the mainframe . 14 1.9 Disk devices . 14 1.9.1 Types of DASD . 16 1.9.2 Basic shared DASD . 17 1.10 I/O connectivity (channels) . 18 1.10.1 Channel subsystem .
    [Show full text]
  • Z9 BC System Overview Level 04A, April 2009
    System z9 Business Class System Overview SA22-1083-04 Level 04a, April 2009 System z9 Business Class System Overview SA22-1083-04 Level 04a, April 2009 Level 04a, April 2009 Note Before using this information and the product it supports, read the information in “Safety” on page | xiii, Appendix D, “Notices,” on page D-1, and IBM Systems Environmental Notices and User Guide, Z125-5823. Fifth Edition (April 2009) | This edition, SA22-1083-04, applies to the IBM® System z9® Business Class (z9® BC) server. This replaces | SA22-1083-03. Technical changes to the text are indicated by a vertical bar (|) to the left of the change. There may be a newer version of this document in a PDF file available on Resource Link™.Goto http://www.ibm.com/servers/resourcelink and click on Library on the navigation bar. A newer version is indicated by a lowercase, alphabetic letter following the form number suffix (for example: 00a, 00b, 01a, 01b). © Copyright International Business Machines Corporation 2006, 2009. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Level 04a, April 2009 Contents Figures............................ix 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
    [Show full text]
  • IBM POWER Virtualization Best Practice Guide
    IBM Power Systems Performance IBM POWER Virtualization Best Practices Guide Version 4.0 March 2020 Copyright © 2020 by International Business Machines Corporation. IBM Power Virtualization Best Practices Guide CONTENTS 1 INTRODUCTION .................................................................................................................... 7 2 VIRTUAL PROCESSORS .......................................................................................................... 7 2.1 Sizing/configuring virtual processors ......................................................................................................... 9 2.2 Entitlement vs. Virtual processors ........................................................................................................... 10 2.3 Matching entitlement of an LPAR close to its average utilization for better performance ....................... 10 2.4 When to add additional virtual processors .............................................................................................. 11 2.5 How to estimate the number of virtual processors per uncapped shared LPAR ...................................... 11 3 AIX VIRTUAL PROCESSOR MANAGEMENT - PROCESSOR FOLDING ....................................... 11 3.1 VPM folding example .............................................................................................................................. 12 3.2 Tuning Virtual Processor Management Folding ....................................................................................... 13 3.3
    [Show full text]
  • IBM Z14 ZR1– Hardware Innovation
    IBM z14 ZR1– Hardware Innovation IBM Z / z14 ZR1 / May 08, 2018 / © 2018 IBM Corporation Trademarks The following are trademarks of the International Business Machines Corporation in the United States and/or other countries. BladeCenter* FICON* IBM* LinuxONE Storwize* z13s z/OS* Db2* Flash Systems IBM (logo)* LinuxONE Emperor II System Storage* z14 z/VM* DFSMSdss GDPS* ibm.com LinuxONE Rockhopper II WebSphere* zEnterprise* z/VSE* DFSMShsm HiperSockets IBMZ* Power Systems z13* zHyperLink ECKD HyperSwap* InfiniBand* PR/SM * Registered trademarks of IBM Corporation Adobe, the Adobe logo, PostScript, and the PostScript logo are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States, and/or other countries. IT Infrastructure Library is a Registered Trade Mark of AXELOS Limited. ITIL is a Registered Trade Mark of AXELOS Limited. Linear Tape-Open, LTO, the LTO Logo, Ultrium, and the Ultrium logo are trademarks of HP, IBM Corp. and Quantum in the U.S. and other countries. Intel, Intel logo, Intel Inside, Intel Inside logo, Intel Centrino, Intel Centrino logo, Celeron, Intel Xeon, Intel SpeedStep, Itanium, and Pentium are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries. Linux is a registered trademark of Linus Torvalds in the United States, other countries, or both. Microsoft, Windows, Windows NT, and the Windows logo are trademarks of Microsoft Corporation in the United States, other countries, or both. Java and all Java-based trademarks and logos are trademarks or registered trademarks of Oracle and/or its affiliates. Cell Broadband Engine is a trademark of Sony Computer Entertainment, Inc.
    [Show full text]
  • LPAR Weight Concepts
    Planning for any System z processor, especially image upgrades, consideration must be given to handling the impacts Determine Per CP Share - Vertical CP Management of PR/SM where the following factors should be considered: * Logical processors are classified as vertical high , medium or low - The number of partitions * PR/SM quasi-dedicates vertical high logicals to physical processors - The CP usage; either general purpose, traditional CPs or the use of IFL/ICF CPs and z/OS specialty processors. vertical medium - The remainder of the share is distributed to the LPAR A: 7.2 CPs – 6 VH,2 VM (60%), 1 VL - The partition mode, either dedicated or shared processors - The ratio of logical CPs to physical CPs defined * Vertical low processors are only given service when other partitions do - The number of logical CPs defined to the partitions not use their entire share and there is demand in the partition LPAR B: 1.8 CPs – 1 VH, 1 VM (80%), 7 VL - The type of system control program (z/OS, z/VM, Linux, etc.), and the workload characteristics in each partition. - The effect of the partitions shared weight and any impact of capping on the partition. * Vertical low processors are parked by z/OS when no extra service is available. Book 0 Important Concepts System z Partitioning Controls * LPAR weights become important only when the processor is extremely busy ( approaching 100%) or are capped * Example CEC 2827-704: Access to resources is relative to other partitions. * There are two dispatchers involved in making resource allocations: - PR/SM Every partition must have a relative weight, the relative weight is also known as the initial - Operating System processing weight (hard cap).
    [Show full text]