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

Page 37

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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Contents IBM Page IBM Third edition March Contents Appendix A. Details of what is detected Reporter output Scanner output Examples Vi Cics Transaction Affinities Utility Guide Vii Trademarks Preface Argument zero Cics Transaction Server for OS/390 BibliographyCics books for Cics Transaction Server for OS/390 Other Cics books CICSPlex SM books for Cics Transaction Server for OS/390Summary of changes Xiv Cics Transaction Affinities Utility Guide Affinities, see the Cics Application Programming Guide Introducing transaction affinitiesRouting region Requesting regionTarget region What does dynamic routing cost? Benets of dynamic routingTransaction affinities Transaction-system affinity Inter-transaction affinityAffinity relations GlobalCics programming techniques for transaction affinity Affinity lifetimesUnsafe programming techniques Safe programming techniquesSuspect programming techniques Avoiding the effects of transaction affinityProtecting applications from one another What next? Important note Introducing the Transaction Affinities UtilityAffinity utility program components Commands detected by the Transaction Affinities Utility Detector component Scanner componentDetector components What is detectedWorsening of transaction affinities relations What is not detectedHow the affinity data is collected Controlling the DetectorSaving affinity data Control record Vsam le Affinity data Vsam lesReporter component Detector performanceBuilder component Report presenting the affinity data in a readable formIntroducing the Transaction Affinities Utility Cics Transaction Affinities Utility Guide Creating the Vsam les Preparing to use the affinity utility programEstimating the size of the MVS data space and Vsam les #termids Dening the Vsam les to CicsPreparing to use the affinity utility program Cics Transaction Affinities Utility Guide Creating a summary report Running the ScannerAffmod DD statement Cics Transaction Affinities Utility Creating a detailed reportContents of a detailed report Is an example of a detailed report produced by the Scanner Cics Transaction Affinities Utility Guide Changing the state Running the DetectorChanging the options CAFF01 Displaying the Detector control screenStarting the collection of affinity data When you can start collecting affinity dataWhen you can pause affinity data collection Pausing the collection of affinity dataWhen you can resume collecting affinity data Resuming the collection of affinity dataStopping the collection of affinity data When you can stop collecting affinity dataCAFF02 Changing the Detector options„1… The control options Perform periodic saves Restore data on startSize of dataspace „4… Last update by useridTransid prex „2… Detect affinity typesDetector errors Cics Transaction Affinities Utility Guide Requesting a report from the Reporter Running the ReporterCAUAFF1, CAUAFF2, and CAUAFF3 DD statements Caucntl DD statementsCmdgrps DD statement Output from the ReporterTrangrps DD statement System Affinity report„2… Affinity types reported „1… Incorrect affinity types„3… Affinities reports TrangroupCommand RecoverableAffinity LifetimeTerminal Producing affinity transaction group denitionsBTS Task Total TransactionsAfflifesystem Descaddress CWA Using the affinity reportModifying affinity transaction groups Understanding the affinitiesRemove false affinities Remove affinity relation worseningCompressing affinity data SPI commands Using the IBM Cross System ProductENQUEUEs/DEQUEUEs Shared storageENQUEUE/DEQUEUE Detailed affinity analysisGetmain Shared SPI commands Cics Transaction Affinities Utility Guide DSPSIZE=16number Running the BuilderCONTEXT=plexname Repgrps DD statement Syntax for input to the BuilderAffgrps DD statement Builder input syntax Output from the Builder Header statementsCombined affinity transaction group denitions Combining basic affinity transaction groups Relation a Relation B Resultant relation C Empty transaction groups report Data sets processed reportGroup merge report Sample group merge report Error reportSample error report Cics Transaction Affinities Utility Guide ENQ/DEQ Appendix A. Details of what is detectedLoad HOLD/RELEASE TS commandsAddress CWA CANCEL/DELAY/POST/START Wait commands SPI commandsCics Transaction Affinities Utility Guide Scanner output Reporter outputExamples Example 2±VS Cobol Which occurs for the rst Move Move Cobol affinities Logon or System when Pconv expectedUnrecognized Transids Cics Transaction Affinities Utility Guide Detector table manager diagnostics Appendix D. DiagnosticsFunction code values Table identier values Reason code values Date formatter diagnostics Detector Cafb request queue manager diagnosticsReason code values This sectionIndex Bappl Vsam Cics Transaction Affinities Utility Guide Sending your comments to IBM Ibmr IBM

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