cics_trianing class_01.ppsx

7/27/2019 CICS_Trianing Class_01.ppsx

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IBM MAINFRAMES

CICS Training Class-01


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Typical mainframe workloas

Most mainframe workloads fall into one of two

categories: batch processing or online transaction

processing.


3/23

Ba!c" processing

One key advantage of mainframe systems is their

ability to process terabytes of data from high-speed

storage devices and produce valuable output.

The applications that produce these statements are

batch applications, that is, they are processed on the

mainframe without user interaction.

A batch ob is submitted !through JCL" on thecomputer, reads and processes data in bulk !perhaps

terabytes of data", and produces output, such as

customer billing statements.


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Batch

Process


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#nline Transac!ion $rocessing

Transaction processing that occurs interactively withthe user is referred to as online transaction processing

!O#T$".

Transaction systems must be able to support anunpredictable number of concurrent users and

transaction types. Most transactions are e%ecuted in

short time periods.

These systems are currently supporting mission-

critical applications& therefore, continuous availability,

high performance, and data protection and integrity

are re'uired.


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OLTP


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%ifference Be!ween Ba!c" An#nline

Ba!c" Sys!em

(nput data prepared before

the e%ecution

$rocessing se'uence ispredictable

$rograms and files can)t be

shared

$rograms are scheduled

through *O+

ecovery and restart is easy

#nline Sys!em

ata is prepared at the time of

e%ecution as needed

$rocessing se'uence isunpredictable

$rograms and files can be

shared

$rograms are initiated through

transactions any time

ecovery and restart re'uires

additional process


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In!ro&c!ion To CICS

/(/ stands for customer information and control system

eveloped in late 01234s as +5/ control system

/(/ provides an interface between the operating system and

application program. /(/ can be used two different levels

Macrolevel/(/initial version operated by assembler

macros to re'uest /(/ services

/ommandlevel/(/high level language version

operated under command which can replace series of

macros


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CICS & Operating System

DAA!AS"

/(/

Application

$rogram

Operating ystem

Terminal

DATASETS


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CICS Componen!s

/ontrol$rograms: these are the program that actually

provide the interface between the operating system and

application program to handle general functions of /(/

/ontrolTables: this defines the /(/ environment.6unctionally associated with control programs.

To e%ecute any program!TA7" in /(/ we need to

specify5define the program name in this table which

further used by control program to e%ecute !(8(T(AT9".

/ontrolAreascontains the system type information about the

task and transaction


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Con!rol Ta'les An Con!rol $rograms

Control Table Control Program

$rocessing $rogram Table $$T$/$

$rogram /ontrol $rogram

$rogram /ontrol Table $/T7/$

Task /ontrol $rogram

6ile /ontrol Table 6/T6/$

6ile /ontrol $rogram

Terminal /ontrol Table T/TT/$

Terminal /ontrol $rogram

Temporary torage Table TTT$

Temporary torage $rogram

85A /$ torage /ontrol $rogram

85A (/$ (nterval /ontrol $rogram


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BASIC MA$IN(S)$$#RT


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In!ro&c!ion To BMS

The primary function of +M is

To design a screen with +M macros

To remove device and format dependency

To provides Te%t handling

To terminal $aging and Message outing


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Map An Mapse!

Any screen developed with help of +M macros is known as

#A$ andcollection of one or more maps is known as

#A$S"

Multimap$anel: ingle panel with two or more maps in it atonce.

MultipleMap:ingle screen with two or more maps in it but

one at a time

To design a MA$9T: e can use either assembler language i.e., !#S

MA/O or 6!SC%""D"'IIIO

'ACILI() Tool


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Map Fiels

6ields are of two types :

Label 'ield

Data*alue 'ield

#abelfields used to specify the label tags on the screen tospecify information

atavaluefields which can be used to pass the data between

map and program

#abel fields does not contain names in name field where as data

value filed does, which are used to create symbolic map data

items.


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BMS Macros

D'+#SD: ATA 6acility ;ierarchy Mapset efinition used

to define a mapset and its characteristics and to specify end of

the mapset

Only one mapset is allowed in one assembly program

D'+#DIMap definition interface used to define a map and

its characteristics. More than one map can be defined in a

mapset program

D'+#D'map definition field used to define a field and itscharacteristics. More than one filed can be defined with-in a

map


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BMS Mapse! Coe S"ee!

1 8 9 14 15 16 72

0-< mapset 5map5field name

, !lan-

1 = 0> +M macros

/ blan-

02-


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STR)CT)RE #f BMS Mapse! $rogram

#A$S"A#" D'+#SD TB$9CDB$AM 96(89 A MA$9T

#A$A#" D'+#DI (E9C!?>,F3" 96(89 A MA$

'IL"DA#" D'+#D' $OC!03,G3" 6(#9

'IL"DA#"D'+#D' $O010H,>3) 6(#9

.

.

#A$A#"2 D'+#DI (E9C!?>,F3" MA$

'IL"DA#"D'+#D' $OC!03,G3" 6(#9

'IL"DA#"D'+#D' $OC!?3,>3) 6(9#

.

.

D'+#SD TB$9C6(8A#MA$9T 98

98

Name Field Macro Field Parameter

Field


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$repara!ion #f CICS Mapse!

!#S ASS"#!L($%O3%A#

ASS"!L"%

CO#$IL"%

S(#!LOIC #A$ $+(SICAL #A$

LI4A3" "DIO%

LOAD #OD5L"

ASMA90

$AMCB$AM!MA$"$AMCB$AM!9/T"


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Types #f Maps

There are two types of maps: $hysical & Symbolic

$hysicalmapwhich represents a load module used in /(/

region for e%ecution. 9nsures device independency

The mapset name ma% can be up to F characters.0-< mapset name used defined used in the program

Fth byte character is suffi%ed by the system at run timebased on the device used

#A$S" should have an $$ "ntry

Symbolicmapwhich represents a copy book containing all the

data item declaration used in the application program. 9nsures

format independency.


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#A$S" D'+#SD ($"0&S(S$A%#6 7 LA30CO!OL6 7

#OD"0IO56 7

IOA$'70("S6 7

SO%A3"0A5O6 7

C%L01'%""4!6ALA%#6'%S")

88888888888888888888888888888888888888888888888888888888#A$ D'+#DI SI9"012:6,;)6 7

LI"06 7

COL5#06 7

J5SI'(0L"'

88888888888888888888888888888888888888888888888888888888

D'+#D' $OS016


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En!ry Re*&ire For Mapse!

#A$S" should have an $$ "ntry.

/ommand to create an entry in $$T.

C"DA D"' #A$S"1#A$S" A#") 313%O5$A#")

C"DA IS #A$S"1#A$S" A#") 313%O5$A#")

/ommand to send the map onto the screen.

C"CI S"D #A$1#A$ A#") #A$S"1#A$S" A#")


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T"ank +o&

cics_trianing class_01.ppsx

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