Table Of Contents - HPE XP7 User Manual

Contents
Overview.................................................................................................. 6
About Parallel Access Volumes.................................................................................................... 6
Devices used in Parallel Access Volumes operations.................................................................. 6
Parallel Access Volumes modes...................................................................................................6
Workload Manager........................................................................................................................8
Hyper Parallel Access Volumes.................................................................................................... 9
Compatible Super PAV..................................................................................................................9
I/O request workflow using Parallel Access Volumes................................................................... 9
I/O request workflow using Hyper Parallel Access Volumes.......................................................10
I/O request workflow using Compatible Super PAV.................................................................... 11
Requirements and specifications........................................................13
Requirements..............................................................................................................................13
Functions incompatible with Parallel Access Volumes............................................................... 15
Parallel Access Volumes shared across multiple sysplexes.......................................................15
Considerations for using Compatible Super PAV........................................................................15
Defining devices....................................................................................19
Unused device addresses usage as alias devices..................................................................... 19
Defining logical control units....................................................................................................... 20
Defining base or alias devices to host operating systems.......................................................... 24
Finding a device eligible for dynamic Parallel Access Volumes management............................29
Address mapping between base and alias devices.................................................................... 34
Preparing for Parallel Access Volumes operations........................... 35
Setting the WLM operational mode.............................................................................................35
Enabling the Super PAV mainframe system function .................................................................37
Hyper Parallel Access Volumes enablement from z/OS on z/VM workflow................................ 37
Enabling Compatible Super PAV on z/OS...................................................................................39
MIH timer value setting workflow................................................................................................ 39
Base devices......................................................................................................................6
Alias devices...................................................................................................................... 6
Parallel Access Volumes in dynamic mode........................................................................7
Parallel Access Volumes in static mode.............................................................................8
WLM in goal mode............................................................................................................. 9
WLM in compatibility mode................................................................................................ 9
Performance design of Compatible Super PAV................................................................15
Cautions on using Compatible Super PAV....................................................................... 16
Restrictions on using Compatible Super PAV.................................................................. 18
Optimal Parallel Access Volumes results and base-to-alias device ratios....................... 19
Optimal dynamic PAV results and alias devices...............................................................19
Hyper Parallel Access Volumes optimum base/alias device ratio.................................... 19
Compatible Super PAV optimum base/alias device ratio................................................. 19
Enabling Hyper Parallel Access Volumes on z/OS.......................................................... 38
Enabling Hyper Parallel Access Volumes from z/OS on z/VM......................................... 38
Contents 3