© 2012 IBM Corporation

IMS Continued ModernizationNancy Stein – IBM IMS ATS

IMS User Group Meeting – Fall 2012

© 2012 IBM Corporation1

More than 75%

of the world’s

Top 25 companies

listed in the

Fortune 100

entrust their

business to IMS

every second

100

© 2012 IBM Corporation2

IMS – an IBM Icon of Progress

© 2012 IBM Corporation3

IMS – from Apollo to XRF

IMS

360

Multi-region

architecture

Scheduling by

intent on

segment type

MFS

3270s

IMS VSVSAM

Secondary Index

Program

Isolation

Parallel DLI

GSAM

Appl. Chk/Restart

VSAM Buffer Pools

MSC

SMP

Fast Path

DBRC

FP Mixed Mode

AOI and CMD calls

IMS VS31 Dependent regions

ISC

MSC VTAM

Data Sharing

IRLM

PROCOPT GON/GOT

DASD Logging

DLI SAS

VSCR

XRF

Scheduling by

intent on

database

© 2012 IBM Corporation4

IMS – from DBCTL through the present day

IMS ESADBCTL

Parallel Sysplex

OTMA

Shared Queues

999 Dependent

Regions

IMSHALDB

Common Service

Layer

Global Online

Change

HALDB OLR

Integrated

IMS Connect

DRD

MSC Bandwidth

Global Status

Management

Open DB

DB Quiesce

ACBLIC Dynamic

Allocation

Transaction Expiration

IMS Web 2.0 Solutions

APPC

ETO

PRPQ for Y2K

Support

IMS Catalog

64-bit FP Buffer

Management

IMS-to-IMS TCPIP Support

Fast Path Secondary Index

IMS Enterprise Suite

© 2012 IBM Corporation5

Compatibility

• Application compatibility

– Programs written in 1969 still work

– IMS does not require recompiles for new IMS releases

• Database compatibility

– Databases do not require upgrades for new IMS releases

• IMS has allowed users to grow their applications in lieu of forcing major conversions

© 2012 IBM Corporation6

Adaptability

• And yet IMS also keeps up with technological trends

– Provides a TCP/IP socket server – IMS Connect

• For access to IMS transactions and databases

– Allows IMS applications to be either clients or servers

– Delivers adapters that run in JEE, SOAP, etc. environments

• Pluggable components that provide easy interfaces to IMS resources

– Supports type-2 and type-4 universal drivers for access to IMS DB

• Provides application programming interfaces

– Unique to IMS

• DL/I calls to access IMS resources: message queues and data

• IMS applications can be written in: COBOL, PL/I, Assembler, C/C++, Pascal, ADA, REXX, Java

– Portable – Java classes and JDBC

© 2012 IBM Corporation7

And …

• That is why IMS continues to be current

– Application programs that were written for IMS 5, 10, 15, 20, 40… years ago can continue to run today

• Even when they are now invoked from the web

– Or continue to be invoked from older 3270 devices or emulators

– The same application, without change, can be accessed from any type of connection mechanism or network that can access IMS

• The IMS architecture allows communication components and even database components to be exchanged or replaced

– Without affecting the application in IMS

© 2012 IBM Corporation8

How does a 44-year old software product continue to thrive?

• Revolutionary Architecture– Multiple regions– Separate database definitions from applications– Separate communication management from

applications• Persistent Compatibility

– An application program written in 1969 still runs on IMS 12

– No application recompile or rebind is required after migrating

– No database conversion required after migrating• Programming interface

– Database definitions maintained in DBDs– Application views and access limitations maintained

in PSBs– DLI calls used for both database access and

input/output messaging• Adaptability

“You build sophisticated

structures around IMS……when

you lift the covers on those IMS

transactions, they are incredibly

sophisticated in what they do…..”

Steve Mills, Senior VP and Group Executive Software & Systems, at IBM IMPACT 2012 Conference Keynote

© 2012 IBM Corporation9

15 million gigabytes of production data managed by IMS

$3.0 trillion ($US) per day transferred through IMS , by one customer

200+ million users served every day

375 million accounts…..for one customer

46,000 transactions per second…..on a single IMS sys tem

© 2012 IBM Corporation10

IMS Evolution Strategy

IMS interfaces IMSNew IMS interfaces and models

Installation and

Operations

Application Developmen

t

Reporting and

Analysis

Reduce the need for special, in-depth IMS skills

JCLISPFSDSFJES

User ModsUser ExitsDBDGENPSBGENACBGEN

OLCDRDDLI

SQL / JDBC

IMS Tools

Rational

Optim

Cognos

InfoSphere

J2EE

pureQuery

IMS TM and DB

Database

© 2012 IBM Corporation11

IMS Evolution / Simplification

• Deliver more intuitive UIs and interfaces to talk to IMS

– Eclipse-based tooling for Application Development – IMS Explorer and IMS 12

– SQL support from Java with Open Database in IMS 11

– More operational consistency with z/OS, CICS, DB2, RDz, and Omegamon for IMS

• Reduce planned outages and manual tuning

– Dynamic Database Buffer Pools – IMS 12

– Database Quiesce – IMS 11

– Dynamic allocation of ACBLIB data sets – IMS 11

– Dynamic Resource Definition – IMS 10

– Online Reorganization – IMS 9

© 2012 IBM Corporation12

Rapid IMS Application Development

• Extending IMS Application Development to Business Analysts

– Make decisions based on up-to-the-minute data

• Business Rules

– ILOG BRMS support – code generation

• Mashups

– IMS Web 2.0 Solutions for Mashup Center

– Available in V10 for IMS TM feeds, IMS 11 for IMS Data feeds

– Ability to easily integrate multiple RESTful services, widgets, data

• COGNOS

– Real time query of IMS data

– Business analyst with no IMS skill can make decisions based on data supplied by IMS

© 2012 IBM Corporation13

IMS 11: Distributed Access to IMS Data• IMS Open Database enables access to IMS databases anywhere in the

IMSplex, directly from z/OS and distributed Java clients !!!

– Using industry standard Distributed Relational Database Architecture (DRDA) to communicate with IMS Connect

– Universal DB Resource Adapter• JEE environments (e.g. WebSphere Appl. Server) - JCA 1.5

• SQL Calls

– Universal JDBC Driver• Non-JEE and JEE environments

• SQL Calls

– Universal DLI Driver• Non-JEE and JEE environments

• DL/I call concepts (SSA, command codes)

– RYO (Roll Your Own) • Program sends DRDA commands directly to IMS Connect

– IMS Connect becomes the gateway to IMS Transactions and IMS Data

Makes Application development and Connectivity much simpler!

© 2012 IBM Corporation14

IMS JDBC Support

• JDBC 3.0

• Standard SQL implementation for the SQL subset

– Keys of parent segments are included in tables as foreign keys

• Updatable results set

• Local commit/rollback support

• Metadata discovery API implementation

– Uses metadata stored in the IMS Catalog

– Enables JDBC tooling to work with IMS DBs as with DB2 DBs

© 2012 IBM Corporation15

IMS Open Database and DRDA

ODBM

IMS Universal DB Drivers

ApplicationRequestor

TCP/IPClient

z/OS

TCP/IP

DDMIMS Connect

TCPIP

DRDAPORT

IMSSCI

DRDA DLICalls

DRA or

ODBA

DRDAIMS Application Server

IMSDB’s

� IMS Connect and Open Database Manager work together as a DRDA server for IMS data

� Allows distributed access to IMS Databases via TCP/IP using the IMS Universal Database Drivers

� Enables use of SQL database query language for access to IMS Databases

IMSCAT

© 2012 IBM Corporation16

Open Database Manager - ODBM• z/OS address space

– Common Service Layer component

• Functions– Receives database connection requests from IMS Connect

– Translates incoming database requests from DDM protocol to DL/I calls

– Manages ODBA or DRA interface to IMS

– Sends/receives byte string to/from IMS

– Translates responses into DDM protocol for the client

– Send results set back to client

• Provides isolation of application containers from IMS– Abend of container during DL/I call does not cause IMS U0113 abend

• Distributed Syncpoint (global transaction) requires RRS on z/OS

• Use of RRS with ODBM is optional– If RRS=Y (default), ODBM uses ODBA interface

– If RRS=N, ODBM uses DRA interface (like DBCTL interface)

© 2012 IBM Corporation17

IMS Open Database

IMS

WAS for z/OS

Traditional ODBAODBA S

CI

Appl.Java Appl.

DR

A

DB

ODBM

SC

I

OD

BA

or DR

A

Traditional ODBA

Java Appl.

JEE

Java Appl.

Non-JEE

IMS

IMSConnect

SC

I

DR

A

DBODBM

SC

I

TC

P/IP

LPAR

ODBA

SC

I

TC

P/IP

LPARRYO DRDA Appl. TCP/IP

OD

BA

or DR

A

CICS

CCTL

Appl.Java Appl. Traditional DRA

DR

ACICS

Appl.Java Appl.

TC

P/IP

CCTL

WAS

Appl.Java Appl.

JEE

z/OS or distributed

TC

P/IP

OD

BA

OD

BA

TC

P/IP Assembler Macro Appl.

Non-JEE (DB2 SP) CAT

CAT

© 2012 IBM Corporation

IMS 12: THE IMS CATALOG

• HALDB PHIDAM / OSAM Database

– Contains metadata about IMS database and program resources, and application information

– Database Metadata • describes a physical database (ie. organization, segments, keys)

– Program Metadata• describes a programs view of the database (ie. access, authority)

– Application Metadata• describes an applications view of the data in the database

– Fields not defined in DBD– Arrays and Structures – Field data types and data type conversion – Field redefines– Alternative Field maps for a segment

– New ACBGEN• Generates ACB member and populates the catalog metadata in a

single UOW

© 2012 IBM Corporation

IMS Catalog• The IMS catalog is a key component of the IMS growth strategy:

– Trusted IMS source for IMS database, program and application information

– All Universal drivers leverage the IMS catalog• Direct access to IMS metadata in the catalog

• No need for separate Java metadata classes on client platforms

• Metadata no longer file-system dependent • Catalog metadata is kept up-to-date via new ACBGEN

– Metadata discovery and exchange via IMS Open Database and the IMS Explorer for Development

– Scalable Open Database solutions– Broad IMS integration with the IBM and ISV portfolio of tools

(Optim Development Studio, Rational Asset Analyzer, InfoSphereData Architect, etc)

IMS Catalog available as of 2Q2012 for IMS 12!

© 2012 IBM Corporation

IMS Enterprise Suite

• IMS Enterprise Suite is a product within the IMS SOA Integration Suite

– IMS Enterprise Suite DLIModel utility plug-in

– IMS Enterprise Suite SOAP Gateway

– IMS Connect APIs

– Java Message Service (JMS) API

– IMS Enterprise Suite Explorer for Development• IMS Explorer V2.1.1.3 download available as of 06-2 2-2012

• Supported with SMP/E and the IBM Installation Manager

• Supports IMS 10, 11 and 12

© 2012 IBM Corporation

IMS Enterprise Suite Explorer for Development• Visualization and editing of IMS DBD and PSB definitions

– Provides graphical editors to: • Display IMS database hierarchical structures• Display/create/edit PSBs• Change/add fields on a DBDs

– Import Cobol CopyBooks and PL/I Structures to a database segment*– Generate DBD and PSB source

• Easily access IMS data using SQL statements– Leveraging IMS Universal JDBC driver

• Access the IMS Catalog for metadata discovery• Connectivity to the z/OS system

– Browse a Data Set and submit JCLs – Import / export DBD and PSB source from a data set to IMS Explorer

• Supports cross-product integration:– IBM® Rational® Developer for System z® – IBM Optim™ Development Studio – IBM Problem Determination Tools Plug-ins for Eclipse

Simplify IMS application development tasks *Requires RDz 8

© 2012 IBM Corporation22

IMS Explorer: Revolutionizing IMS application development

Graphical interface to easily access and manipulate IMS data using standard SQL

Graphically-driven editors to display and update IMS program and database definitions

Generate SQL to access IMS data

See database relationshipsChange DBD and PSB definitions

© 2012 IBM Corporation

IMS EXPLORER HANDS-ON LAB