IBM OS/390 User Manual

┌───────────┬───────────┬─────────────────────────────────────────────┐

│ Coupling │

OS/390 │ Log stream possibilities

│

│ facility? │

Version

│

2.4?

│

├───────────┼───────────┼─────────────────────────────────────────────┤
│ Yes │

No │ All must use CF.

│

├───────────┼───────────┼─────────────────────────────────────────────┤
│

No │ Yes │ All must use DASD-only.

│

├───────────┼───────────┼─────────────────────────────────────────────┤
│ Yes │ Yes │ Individual log streams can use either CF or │
│ │ │ DASD-only.

│

│ CICS TS Release 2 not supported.

│

├───────────┴───────────┴─────────────────────────────────────────────┤
│ Note:

Without a coupling facility, you cannot share general log

│

│ streams across MVS images.

│

└─────────────────────────────────────────────────────────────────────┘

Figure 13. Log Stream Choices Resulting f r o m Hardware and Software Used

CICS system programmers need to consult with their MVS system programmers
to plan the storage required for the log streams needed by the CICS log
manager.

Figure 14 shows MVS data sets used by CICS.

┌──────────────────┬────────────────────┬────────────────────────────┐

│ SDUMP data sets │ MVS SDUMP macro

│ Used by CICS for system

│

│ dumps via the MVS SDUMP

│

│ macro.

│

├──────────────────┼────────────────────┼────────────────────────────┤

│ SMF data sets

│ System management │ Used by CICS monitoring

│

│ facility

│ and statistics domains

│

│ for monitoring and

│

│ statistics records.

│

│ GTF data sets

│ Generalized trace │ Used by CICS trace

│

│ facility

│ domain for CICS trace

│

│ entries.

│

└──────────────────┴────────────────────┴────────────────────────────┘

Figure 14. MVS Data Sets used by CICS

Please refer to the

OS/390 Initialization and Tuning Guide for information on

calculating the size of SDUMP. For background information about SMF and data
set considerations consult the

OS/390 MVS System Management Facilities.

However, you must reference the

CICS Customization Guide for information on

CICS monitor records and sizes and the

CICS Performance Guide for information

on CICS statistics records and sizes. If you are to use CICS with GTF please
review the

OS/390 MVS Diagnosis Tools and Service Aids.

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