Chapter 3. Preparing to use the affinity utility program

This chapter describes what needs to be done before you can use the affinity utility program.

vªCreating the VSAM ®lesº

vªEstimating the size of the MVS data space and VSAM ®lesº

vªDe®ning the VSAM ®les to CICSº on page 22

vªTailoring your CICS startup jobº on page 23

vªRestarting your CICS regionº on page 23

Creating the VSAM ®les

The Transaction Affinities Utility uses one copy of each of the following VSAM ®les for each CICS region it is run against:

Table 2. Transaction Affinities Utility VSAM ®les and associated jobs

File

Description

Job

 

 

 

CICSAFF.CAUCNTL

A recoverable ®le used to hold control

CAUJCLCC

 

information

 

 

 

 

CICSAFF.CAUAFF1

Non-recoverable ®les used to hold affinity data

CAUJCLCA

CICSAFF.CAUAFF2

with different key sizes (17, 33, and 225

 

CICSAFF.CAUAFF3

respectively)

 

 

 

 

To create a set of these ®les forone CICS region, edit and run a copy of the associated jobs in the CICSTS13.CICS.SDFHINST library. Edit and run a copy of the CAUJCLCC and CAUJCLCA jobs for each CICS region against which you are going to use the Transaction Affinities Utility.

Before you run the CAUJCLCC and CAUJCLCA jobs, change the following parameters in the jobs:

vThe JOB accounting parameters.

vThe pre®x of the ®les (&AFFQ), this should contain a CICS region quali®er.

vThe volume id (&DSVOL) of the DASD device where the ®les are to reside.

Estimating the size of the MVS data space and VSAM ®les

An MVS data space is used to hold the affinity data collected by the Detector. The amount of storage required depends on the number of affinities discovered, the number of different transaction identi®ers, and the number of terminals.

To estimate the amount of storage for the data space (and therefore the size of the VSAM affinity ®les) that you are likely to need for the Detector, you can use the following algorithm (with storage values in bytes):

Data space:

(#transids * #termids * 250)

+ 5

000,000

CAUAFF1

:

(#transids * #termids * 40)

+

1

000,.000

CAUAFF2

:

(#transids * #termids * 150)

+

1

000,000

CAUAFF3

:

1 000,000

 

 

 

where:

© Copyright IBM Corp. 1994, 1999

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IBM OS manual Preparing to use the affinity utility program, Creating the Vsam les

OS specifications

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