Page of GC20-1821-3 As Updated April 1, 1981 by TNL GN25-0840 time-sharing systems, performance, emphasizing response time 37
transferring output, between CMS and
operating system, technique for 24-25 TSO multiple-access virtual machine, directory entry example two-channel switch, VM/370 alternate path
support for 19-20 two-channel switch additional feature, alternate path support for 19-20 U unit record devices
for spooling, dedicating to virtual
machine operating systems 44
virtual, use by DOS/VS virtual machine
84
unsupported devices
dedicating to virtual machines, by using
DEDICATE control statement 44
defining, by usinq SPECIAL control
statement 45
using under VM/370 4 USER control statement, example, defining VM/370 virtual machine 51
utility proqrams, VM/370, using 120-121 V V=R virtual=real) VIRT=REAL option directory entry example, specifying for
multiple-access virtual machine 49
double pagina eliminating for virtual machine
operating systems 41-42
eliminating for virtual machine
operating systems (5748-XE1) 42-42.1
virtual=real
jobs executing under nonpaging mode, in VS1 virtual machine 113
performance option, specifying for
virtual machines 36
virtual control units, caution, specifying
devices with special I/O protocol 46
virtual devices
defining with VM/370 directory control
statements 46
states or conditions under VM/370 16
virtual disk minidisk)
virtual interval timer assist, DOS/VS, accounting under VM/370 73-74
virtual lines, defining for multiple-access
virtual machine 26-28
virtual machine VM/370) adding I/O devices without using real
devices, using SPECIAL control
statement 45 allocating resources 1-2
alternate path support for 19-20 ASP, using under VM/370 31-33
configurations
for alternating between operating
systems 26
for VM/370 virtual machine 52-54
measuring workload performance 34-35
measuring workload performance 34.7-35
performance factors for operating
systems run under VM/370 33-34
performance factors for operating
systems run under VM/370 34.7-35
dedicated channels, specifying 17
dedicated devices, using as alternative
to dedicated channels 17
definition of 1
directory entries
creating and updating 38-39
specifying control statements 40-45 directory entry examples AUTOLOG1 46-48 AUTOLOG1 for multiple systems 48 AUTOLOG1 for single system 47 CMS for use with OS/VS 116 DOS 82 DOS/VS 75,82
for alternating between operating
systems 25 MFT 124
multiple-access 28,49 MVS 125-126
as/vs 116
test system (TESTSYS) 49 TSO multiple-access 49 VM/370 virtual machine 51 VS 1 125
do uble paging
eliminating by use of VIRT=REAL option 41-42
eliminating by use of VIRT=REAL option 42-42.1
error recovery, provided by operating
system in 16 I/O interruptions, processed by
operating system in 16
multiple-access, defining and using under VM/370 26-31
operating systems supported under VM/370 2
options
defining 40-42 defining 40 defining 40-42.2 optional services for operating
systems run under VM/370 6-7
specifying 7
performance
guidelines for operating systems run
in 33-37
guidelines for operating systems run
in 34.5-37
measuring for 37 148 IBM VM/370 Operating Systems in a Virtual Machine
Page of GC20-1821-3 As Updated April 1, 1981 by TNt GN25-0840 printing abend dumps for operating systems 5
reducing VM/370 paging activity for 5 SIO instructions, reducing I/O operations for 6
specifyinq consoles for 14-15
testing and updating VM/370 virtual
machine 51-68
usinq IPt command to restore contents <'2 74 8- 4 2 1
using IPt command to restore contents 42
v irt ual dev ices
defining with VM/370 directory
control statements 46 VM/370 I/O management for 16 VMCF, to communicate/transfer data
between virtual machines 7
virtual machine assist
effect on virtual machine paging
performance 5
performance option, specifying for
virtual machines 36 STFIRST option, permits issuing of SET STBYPASS nnnnnK command (5748-XE1) 41
v irt ual machine
effect on performance 33-34
effect on performance (5748-XE1) 34.5-34.6
virtual machine communication facility VMCF) Virtual Machine Facility/370 (see VM/370) virtual storage preservation support VM/370 Basic System Extensions program product)
virtual storage preservation support (.2148-X]1) VM/370 System Extensions
program product)
virtual TeU, example, controlling remote
terminals 30 virtual timer, updating under VM/370 41 VMA (§gg virtual machine assist) VMAP (VM/370 Performance/Monitor Analysis
proqram)
measurinq workload performance of both VM/370 and virtual machines 35
MONITOR command, reduce and analyze data
from 37
shadow tables
reducing and printing monitor records
for (.2148=!]1)' 34.3,34.4 VMCF (virtual machine communication
facility)
data transfer and communication between
virtual machines, brief description and
reference 7 VMFtOAD, using for VM/370 virtual machine,
example 59-60 VMSAVE option OPTION control statement
automatically saving contents of
virtual machine (2148-XX8) 42.1
automatically saving contents of virtual machine (2148-XE1) 42.1 VM/VS handshaking
autopoll, required for DOS/VS 8
for DOS/VS and DOS/VSE 70 ISAM option required for 7 VM/370 performance, effect on 35 VS 1
enhancements in nonpaging mode
114-115
major discussion 110-115 using nonpaging mode 112-114 VM/370 (Virtual Machine Facility/370) machine)
alternate path support, for virtual
machines 19-20 alternating between CMS and operating
system, to create and test programs
24-26 ASP, using in virtual machine 31-33
BTAM autopoll channel programs, checking
and bypassing for 8
channel checks, handling under VM/370 13-14
components, brief description 2
error recording, for operating systems
4
error records, accessing for operating
systems 4
generating operating systems under,
advantages of 38 I/O instructions, reducing number issued
by virtual machine 6 I/O management, sharing devices between
virtual machines 16 I/O waits, effect of processing on
operating systems under VM/370 12
multiple-access system, using in virtual
machine 26-31
page waits, effect of processing on
operating systems under VM/370 11-12
paging
effect on application programs 4
reducing for virtual machines 5
performance
measuring for 37
paging factors affecting virtual
machines 5
performance factors, for operatinq
system run in virtual machine 35-37
performance guidelines 33-37
performance guidelines 34.5-37
performance options, for system analyst
and general user 36
reserve/release support, for operatinq
system in virtual machine 20-23 service programs, using 120-121 spooling, closing spool files 13 System Extensions Program Product,
performance additions (description)
36-37
system generation
defining alternate path support for 20 def ining CTCA for ASP virtual machine
32
defining hardware features for
alternate path support 20 unsupported devices, how to use 4
Index 149
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