SPFEDIT recommendations with CA MIM GDIF
Article ID: 216041
Updated On:
Products
Issue/Introduction
What is the recommendation to code SPFEDIT to prevent reserves
Noticing the SPFEDIT reserve not always being converted (as seen in display counts) and holding up a VOLSER and causing issues for others.
IEF196I IOS071I 3557,**,SMSVSAM, START PENDING
IEF196I STATUS: I/O WAITING FOR I/O OPER FROM ANOTHER SYSTEM
IOS071I 3557,**,SMSVSAM, START PENDING 624
STATUS: I/O WAITING FOR I/O OPER FROM ANOTHER SYSTEM
OPS3092J OI IOS071I 3557 IOS071I-TESTPLEX-3557 *MASTER* MSTR 6FB613D0
IOS071I 3557,**,SMSVSAM, START PENDING STATUS: I
OPS3092J I/O OPER FROM ANOTHER SYSTEM
/D GRS,DEV=3557
ISG343I 17.03.25 GRS STATUS 263
DEVICE:3557 VOLUME:TSL095 RESERVED BY SYSTEM SYSV
S=SYSTEM SPFEDIT USER001.ISPF.ISPPROF
SYSNAME JOBNAME ASID TCBADDR EXC/SHR STATUS
SYSV USER001 02BF 00AAC768 EXCLUSIVE OWN
Environment
Release : 12.5
Component : MII
- Running with PROCESS=ALLSYSTEMS
- SPFTEMP datasets are LPAR specific based on naming standards (eg. LPAR name included in data set name)
- SYS1.BRODCAST and SYS1.UADS not shared between LPARS in MIMPlex
MIMINIT:
GDIINIT PROCESS=ALLSYSTEMS
MIMEXMPT:
LOCAL QNAME=SYSDSN,RNAME=?.ISPF.ISPPROF
LOCAL QNAME=SPFEDIT,RNAME=?.ISPF.ISPPROF
LOCAL QNAME=SYSDSN,RNAME=?.SPFTEMP0.CNTL
LOCAL QNAME=SYSDSN,RNAME=?.?.SPFTEMP0.CNTL
MIMQNAME:
SPFEDIT, GDIF=YES, /* ISPF
SCOPE=SYSTEMS,
EXEMPT=YES,
ECMF=YES,
RPTAFTER=0,
RPTCYCLE=60
SYSDSN GDIF=YES, /* DATASET ACCESS
SCOPE=SYSTEM,
EXEMPT=YES,
ECMF=YES,
RPTAFTER=30,
RPTCYCLE=60
MIM1016I GDIF COUNTS display
Last RESTART at 07:28:46 on 2021.136
RESOURCE TYPE ------ ENQS ------ ----- RESERVES ----- GLOBAL
(QNAME) ISSUED PROCESSED ISSUED PROCESSED CONFLICTS
SYSZVVDS N 3 0 151.998M 0 0
SYSIGGV2 S 0 0 132.740M 132.740M 1.028M
SYSDSN M 16.518M 16.372M 0 0 5,605
SYSVSAM S 14.799M 11.958M 0 0 207,734
SPFEDIT S 311,904 281,026 290,312 270,430 34
Cause
LOCAL statement for ISPF.ISPPROF in MIMEXEMPT preventing ENQ from being propagated globally and convert reserves
Resolution
Recommend 2 changes:
1. Change PROFILE_SHARING=YES in ISPF.
This is explained in Chapter 3: Customizing ISPF
2. Remove or comment the following 4 LOCAL statements in the exempt member, MIMEXMPT:
LOCAL QNAME=SYSDSN,RNAME=?.ISPF.
LOCAL QNAME=SPFEDIT,RNAME=?.ISPF.
LOCAL QNAME=SYSDSN,RNAME=?.SPFTEMP0.
LOCAL QNAME=SYSDSN,RNAME=?.?.
- Removing the 2 ISPPROF statements will cause GDIF to propagate these ENQs globally and convert the reserves.
- Removing the 2 SPFTEMP statements will causes GDIF to propagate these ENQs globally. This is safe because the system name is part of the dataset name, therefore no false global ENQ contention should occur.
An IPL is recommended to implement these changes.
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