CICS - Intro and Overview V4

8/2/2019 CICS - Intro and Overview V4

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Introduction and Overview

Larry Trollope

Monday August 8, 2011Orlando, FL Session 9627


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This session provides an introduction to CICS and

provides an overview of the product. CICStransaction processing and application server.

attendee with information regarding importantf n i n li h A li i n D v l m n

Storage Management, File Control, DB2 and MQattach, Security, Two-phase commit,

and Dispatching. The attendee also will see howresources are defined and will be introduced to the

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new ace o , e xp orer.


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'

30 billion transactions/day, >$300B/week

40 years invested in applications16,000 customers worldwide

950,000 programmers earntheir living from CICS30 million users

Over 900,000concurrent users/system

Used by 490 + of IBM''s top500 customers

5000 packages from 2000 ISVs

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50,000 CICS licenses


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What is a transaction and what should

transact on s t e un amenta un t o wor orwhich recovery, consistency and concurrency are.

test it should provide:

Atomicity, Consistency, Isolation and Durability

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What else should transaction

Should provide tools to assist in development Should have an API to shield developers Should have tools to assist in operations

Should support major platforms ou suppor ma or a a ase sys ems Should support major network protocols

And it should support Web-based applications

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SoCICSis a Transaction Mana er?Customer Information Control System

also known as .......

a Transaction Server

a Transaction Monitor

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So what doesCICSactually do?

CICSprovides a concurrent program executionenvironment for multiple end users, who have.

CICSwill manage the operating environment toprov e per ormance, sca a ty, secur ty anintegrity.

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Transaction Processing Requirements Large volume of business transactions to be rapidly and accurately

processed

Multiple users, single/sysplex or distributed

With potentially: Simultaneous access to data A large volume of data residing in multiple database types Intense security and data integrity controls necessary

The access to the data is such that: Each user has the perception of being the sole user of the system A set of chan es is uaranteed to be lo icall consistent

If a failure occurs, any intermediate results are undone before thesystem becomes available again

A completed set of changes is immediately visible to other users

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CICSProvides .......

Systems Services Storage, Program, Task and Time Control

, Communications Services To other CICS's, end-users, the web and other non-CICS

programs SNA TCP/IP

Data Mana ement Services with Commit with Logging

Application Development Services API

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Language Tools

Debug Support


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DoesCICSRun on a S stem z? Well yes it does .......

,

AIX, HP-UX, Solaris,and on Windowsand VSE

and OS/400and Linux (PRPQ 7J0468 on ystem x)

-

CICS also has Gatewa s Clients Connectors and

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Systems Management....much much more


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-

CICS API

CICS

DATA BASE SUPPORTCOMMUNICATION SERVICESTASK MANAGEMENTPROGRAM MANAGEMENT

STORAGE MANAGEMENTLANGUAGE SUPPORTOPERATOR INTERFACE

SYSTEM MANAGEMENTMONITORIING AND STATISTICS

Communications Database Mana er

TIME MANAGEMENTRECOVERY SERVICES

CONNECTIVITY MGMTWEB SERVICES

Operating System

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CICSSystems Services - Security

Strong security facilities are available in the CICS to implementidentification, authentication and authorization

Uses SAF calls to access External Security Manager

Logon/Signon Passwords (8 characters upper/lower/special char) Pass hrase 100 character

CICS implements techniques to protect

Resources Commands

12 Encryption of communication flows


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CICSSystems Services - Storage

Effective use of memory is key to performance

Supported Virtual Storage, Paging

Redesigned to .........

Utilize 31-bit addressing

Provides storage protection within a region-

Storage has been a major evolution allowing for

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significant transactional growth


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Abnormal termination and exception handling

Interval Control for time initiated events

Multitasking and subtasking

Different TCB's dispatchedr or y sc e u ng

Open Transaction Environment (OTE)

JVM Server for threadsafe Java programs Pooled JVM for non-threadsafe Java ro rams

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(See CICS TS 4.2 Statement of Direction)


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CICSSystems Management Operator commands to control the transaction processing environment

(e.g. inquire/change trans, trace, purge trans .)

CICS Ex lorer Web based definition o eration and monitorin

Resource Definition Online (RDO) provides dynamic definitions Dynamic Program Library Management without CICS restart

TRUES Task Related User Exits

GLUES Global User Exits URM User Replaceable Modules

Monitoring tools are available to analyze performance and load

CICS Statistics Utilities

CICS Performance Monitor CICS Performance Analyzer

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Web based interface (WUI) included with CICS Transaction Server


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CICSCommunications Services

SNA - VTAM 3270 Terminals .

CICS or IMS ISC (InterSystem Communication) FEPI Front End Programming Interface

MRO Multiple Region Operation XCF / MRO - Cross-system MRO (CTC or Coupling Facility) EXCI External CICS Interface TCP/IP

TCP/IP Sockets

Internet protocols (e.g. HTML, XML, SOAP) Remote Procedure Calls (ONC RPC)

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ote tatement o rect on .

WebSphere MQ


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CICSData Services u p e ypes, mu -access w n same ransac on

VSAM (KSDS, ESDS, RRDS)and VSAM transparency too.

DB2

IMS DBCTL n many o er r par y a a ase pro uc s

Transient Data queues (TD queues) Temporary Storage (TS)

>

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Data integrity, logging, recovery, backout, restart


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CICSApplication Development Services

XPI, SPI added for Systems Programmers

anguage uppor

(Assembler, COBOL, PL/I, C, C++, Java, REXX)

Dynamic Scripting with PHP and Groovy support

Command Interpreter

End to end debugger for client and server

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Support for BMS/3270 screens, Web Services, and Atom feeds


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But What Does aCICSCommandLook Like ?

EXEC CICS DOCUMENT CREATEEXEC CICS LINK

PROGRAM M Pro ram'

TEXT(AppPgmCA)LENGTH(Input_data_len)

NOHANDLE

COMMAREA(MyData)

LENGTH(LengthofMyData)

EXEC CICS WEB SEND

DOCTOKEN(Atoken)

EXEC CICS READNEXT

DATASET(MENUFILE')

INTO(MASTER-MENU-RECORD)

STATUSTEXT(StatusText)

LENGTH(StatusLen)

CLNTCODEPAGE('819')

RIDFLD(MENU-KEY)

LENGTH(OPTION-LENGTH)

RESP(CICS-RESPONSE)

NOHANDLE

QUEUE('CSSL')

FROM(IDMSG)

LENGTH(IDMSGLN)

EXEC CICS GET

CONTAINER(MsgInput)

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RESP(RESPVAL) -SET(Msg-Ptr)

FLENGTH(Msg-Length)


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CICSEvents Processing n even s any ng o s gn cance o an en erpr se

CICS allows users to capture, format and emit businessevents from CICS

, ,Start Transaction for further processing

editor built into CICS Explorer and Rational Developer forSystem z with Java (RDz)

The bindings are enabled using a BUNDLE resource

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RDO or CEMT


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CICS One or Man CICS Re ions? CICS can run in one single region

CICS can run as several independent regions on asingle system or across multiple systems

CICS can run as several interconnected regions on

multiple images on a single system or across severalsystems

S s lex - z/OS

CICSplex a group of CICS regions

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CICSPLEX SM CICSplex Systems Manager


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CICS What do a call a bunch of regions?For manageability and recoverability CICS regions in aCICSplex are often segregated by function

TOR Terminal Owning Region

ROR Remote Owning Region

AOR Application Owning Region

FOR File Owning Region

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QOR Queue Owning Regions


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CICS How Does Your S stem Grow? ISC and MROInterSystems Communication - system to system

u - eg on pera on - reg on o reg on

XCF/MRO Cross System Coupling Facility MRO IPIC IP InterCommunications

Multi-platform

Clients and Gateways

o s ng e po n s o a ure

Systems Management

23 Workload Balancing


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CICSMRO, ISC, IPICandXCF

SNA or TCP/IP Network

TOR TOR TOR

AOR AOR AOR AOR AOR AOR

Sysplex A Sysplex A

MVSA MVSB MVSCCF

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Communicating among CICSs can be

using memory, SNA or TCP/IP


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CICSe-business o tions

DistributedWebSphere and

CICS TransactionGateway

z/OS WebSphere

New CICS JavaApplications

CICS Transaction

Gateway

CICS

Applications

ExistingCICS Nat ive

Interfaces Classic CICSApplications

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pragma c approac o mp emen ng e- us ness so u ons


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CICSTransaction Gateway (TG)

Enables client applications to invoke services in CICS

Gives users at Web browsers access to business critical applicationsrunning on CICS servers

Supported on multiple platforms:Windows (XP, Vista, Windows 7)

Linux -z/OSAIXSun Solaris

Client InterfacesMQ client - WebSphere MQ queues

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External Presentation Interface (EPI) 3270 Screen Based

External Call Interface (ECI) - Call and Return with Data

Remote Procedure Call


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Support for IBM JEE and JCA connectors

z/OSHTT

Serv

Browser WebSphere CICS Transaction Server

CICS Transaction

let

COBOL Program

TCP/IP

ECI

EJB Cobol Program

Gateway

DB2

Databases

Command Bean

zServerAny platform that canrun WebSphere and

CTG

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CICS ApplicationProgram

n

External Call InterfaceEPI

External PRESENTATION Interface

ECIExternal CALL Interface

Intelligent Workstation orother CPU

Intelligent Workstation orother CPU

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CICSaccess with Java

CICS Client and Gatewa classes Used by Java program to run a CICS transaction ECI, EPI calls available

JCICS Classes

Allow CICS function execution for Java programs

Connection to CICS can be by

Program calls can be created by programdevelopment workbenches

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CICS Transaction Server

Web

Browser

Web

Interface

us nessLogic

Interface

ApplicationTCP/IP

Service

3270Bridge

Rapid enablement of 3270 Terminal Transactions

Utilities provided to recover old maps

CICS interprets HTML/XML flows, formats as if it came from 3270

Allows new web applications to be written using CICS skills Linkable bridge allows EXCI invocation of 3270 terminal based trans

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CICSWeb Su ort

WebBrowser

CICSWebInterface

BusinessLogicInterface

ApplicationCICSTCP/IPService

Gives CICS applications direct access to web browser

Allows new web applications to be written using CICS skills

Secure Socket Layer (SSL) support using up to 256 bit encryption

ert cates mappe to Mixed case password and passphrase support

Can be s s lex enabled

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CICSService Oriented Architecture (SOA)

Service ServiceMsg Msg Msg Msg Msg MsgCICS

CICS Web Services

Inte rated into most current release

Requestor ProviderIn 1 In - 2 In 3 Out 1 Out -2 Out - 3

Program

PipelinePipeline

Defined by Web Service Description Language (WSDL) CICS role in SOA can be service requestor, service provider or both

CICS Web Services utility programs Use a Web Service provided by an external provider

Support for web services standards and technologies WSDL 2.0 - . WS-Security WS-Trust WS-Addressing

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Optimized Packaging (MTOM/XOP)


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High Volume and High Availability

on gurat on

CTG DB2

PortCTG

EXCI

CICS

MQ

WebS here TCP/IP

CTGCICS

MQ

Port CTG

EXCI

CICSMQ

CTG

CTGCICS

DB2

MQ

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Work Load Agent MVS Work Load Manager


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CICSTools If CICSdoes not provide the needed functionality there are

many tools available from IBM and other vendors to assist in

For example IBM provides the following:

CICS Configuration Manager for z/OS CICS Interdependency Analyzer CICS Online Transmission Time O timizer for z/OS CICS VSAM Recovery for z/OS CICS Performance Analyzer CICS Business Events Publisher

CICS VSAM Transparency CICS Deployment Assistant for z/OS CICS Service Flow Runtime

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IBM Tivoli OMEGAMON XE for CICS on z/OS REXX for CICS Transaction Server for VSE/ESA Extensions to the CICS Information Center


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I mm r CICSis ideal for existing transactional environments and

..

Availability, Maintainability, and Scalability

Tools for Development, Support and Operation

Continues exploitation of new hardware and softwaretechnology

Plenty of education is available

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Some UsefulCIC Information

http://www.SHARE.org

SHARE Website Volunteer Center >

then select Data ProgramCICS Project

ou n n orma on on:CICS AnnouncementsCICS Tools

CICS User GroupsCICS-L Discussion group (listserv)

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Some useful IBM Websites

http://www.ibm.com/software/htp/cics/CICS Product Information

http://publib.boulder.ibm.com/infocenter/cicsts/v4r2/index.jspCICS Information Center for CICS Transaction Server

http://www.redbooks.ibm.com/

Download Redbooks

. .SOAP for CICS Information

http://www.ibm.com/software/ts/cics/education/

sts ava a e tra n ng courses an cert cat ons

http://www.ibm.com/support/docview.wss?uid=swg27007241

CICS Su ortPacs

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CICS Redbooks

. . .Introduction to CICS Dynamic Scripting SG24-7924-00Redbook, published March 28, 2011

Threadsafe Considerations for CICS SG24-6351-03

Redbook, published March 14, 2011

Extend The CICS Explorer: A Better Way to Manage Your CICS SG24-7819-00Redbook, published February 23, 2010

Java Application Development for CICS SG24-5275-03Redbook, published February 24, 2009

Implementing CICS Web Services SG24-7657-00Redbook, published November 12, 2008

Exploring Systems Monitoring for CICS Trans Gateway SG24-7562-00e oo , pu s e pr ,

CICS Web Services Workload Management and Availability SG24-7141-01Redbook published March 31, 2008

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CICS Systems Manager in the WUI as the Principle Management Interface SG24-6793-01Redbook, published November 16 2007


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I never said most of the thin s I said.

If you ask me anything I don't know, I'm not going to answer.

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-- Yogi Berra

Documents

CICS - Intro and Overview V4