agile development on system z

Flemming PetersenDevOps for Enterprise Systems, IBM Systems Nordic

November 2015

Agile Development on System Z

© 2015 IBM Corporation 2

Agenda

Development on the mainframe is sometimes perceived as old and slow.

We think this is wrong, but many organization do experience that

mainframe development is a bottleneck in the overall delivery lifecycle

So why is it so? Can we learn the dinosaur to dance?

DevOps for Enterprise Systems will address this, but how to get there?


Disruptive Buzz – Fun facts

• Just 10 years ago….

• How would your bank give you peer to peer mobile

payments? Or would your search engine?

• Would one of the largest providers of accommodation,

be providing hotel rooms? Or private homes?

• Would there be an app for anything? Or would you play

Snake on your Ericsson or Nokia phone?

Source: Wikipedia. The Forbes Global 2000 is an annual ranking of the top 2000 public companies in the world by Forbes magazine.

The ranking is based on a mix of four metrics: sales, profit, assets and market value. The list has been published since 2003.

https://en.wikipedia.org/wiki/Public_companies

https://en.wikipedia.org/wiki/Forbes

https://en.wikipedia.org/wiki/Sales

https://en.wikipedia.org/wiki/Profit_(accounting)

https://en.wikipedia.org/wiki/Asset

https://en.wikipedia.org/wiki/Market_value


How does it affect mainframe developer

Plan Develop Build Test Deploy Production

Rapid iterations

Systems of Engagement

Plan Develop Build Test Deploy Production

Slower iterations

Systems of Record

AlignmentContinuous synchronization

and planning

Continuous testing

Continuous deployment

and monitoringApplications and teams move at variable speed


So are you up for learning new tricks?

It is not just a matter of getting an editor which is faster than ISPF

It is about changing our practices to adopt new tricks (become agile), so

we can deliver business functionality to the market faster

- Adopt to Agile

- Planning

- SCM

- Rethink your mainframe testing

- Environments

- Automation


IBM’s DevOps approach

Lean & Agile are at the heart of

IBM’s DevOps approach

Key concept:

MVP:

Minimum

Viable

Product

Reduce work

Eliminate

bottlenecks

& waste

Fast response

times

Small batch

sizes

Continuous

feedback

LEAN AGILE

Efficiency Effectiveness


Evolution to Continuous Delivery

DevOps is based on

Agile Principles

LEAN©

Continuous

User Feedback

& Optimization

Collaborative

Development

Continuous

Release and

Deployment

Continuous

Monitoring

Continuous

Business Planning

Continuous

Testing

Operate Develop/

Test

Deploy

Plan

DevOpsContinuous

Feedback

Develop Build Deploy Test Provision


The Shift Left Solution… Test in small incremental batches Build Test UAT

Build Test UAT

Build Test UAT

App B

App A

App C

Integrated

Pre-prod

Production

Status

I/F

I/F

What does this mean for the mainframe?


Rational Developer for System Z as the modern IDE for productive development of cross-platform applications

written in COBOL, PL/I, HLASM, Java, EGL or C/C++ in System z CICS, IMS, DB2, Batch applications

Graphical access to typical System z sub-system functionality in z/OS, CICS, IMS, DB2, WAS Integration with

PD-Tools Fault AnalyzerFile ManagerDebug Tool

Rational Asset Analyzer for Application Understanding

and Impact Analysis

Team Concert for Agile planning and Source Management

Modern Mainframe DevelopmentImplement a modern Development Workbench is still a good idea


Dev/Test SystemTest Prod

Serialization

Account

ProductCustomer

Lack of reliable and flexible test environments cause serialization o Dev/Test not stable as many projects are

developing at the same time

o Dev/Test data is of poor quality

o To perform a consistent test, SystemTest is

booked for projects

o Only 1 project can be in the pipeline

o - Or we accept poor quality SystemTest

o - And automated test is very hard


Rational Development and Test Environment (RD&T) for IBM System z

• Reduce System z development costs with off host development and test

"RD&T provides us with the ability to try development approaches that may introduce instability to our normal environment with none of the associated risks. It provides an environment where we can quickly start a new project without waiting for setup delays inherent in our day-to-day processes.”ad

RDz & ISPF

RDz


Deploy what is ready, virtualize the rest

Test Environments

Push button

deployments to

test or production

Deploy what is

ready, virtualize

the rest

z/OS application

testing on

emulated z System

hardware

Continuously test

in production-like

env.

Simultaneously test across

multiple test stages

Dev QA

DatabasesThird-party

ServicesMainframe

Dynamic

Infrastructure

Virtual components

Integrated

with


SCM

UrbanCode Deploy Integrate Systems of Engagement with Systems of Record

IBM UrbanCode

Deploy for z/OS

• Standardize on a single tool to manage and orchestrate heterogeneous application deployments

• Manage configurations and automatically provision environments for faster testing and promotion of

changes

• Improve visibility and control of “what is deployed where” with the ability rollback to any prior version at

ease

• Remove dependency on rigid and error prone release and deployment processes

IBM Rational

Test Workbench

RD&T Test Environment

Rational Developer

for System Z

ISPF Green

Screen


A few examples in action

Editor, navigation, Cobol rules

• Click here for video

Testing and Code Coverage

• Click here for video

../../Videos/editor and cobol rules.avi

../../Videos/test2.avi


What’s New in DevOps for Enterprise Systems?

• New Compilers to optimize performance on z13

• Enterprise COBOL for z/OS V5.2, Enterprise PL/I for z/OS

v4.5, z/OS XL C/C++ V2R1M1, XL C/C++ for Linux on z

Systems V1.1

• Rational Developer on z

• Improvements in zUnit Automated Unit Testing Framework

for z/OS with Headless code review and code coverage

• With integrated Debugger, Multiple users can run and debug

the same CICS transaction on the same region at the same

time

• Rational Development & Test

• Exploit added zEnterprise capability (Parallel Sysplex)

• New, flexible licensing to support automated testing and

variable usage patterns

• Rational Test Workbench 8.7

• Virtualize DB2 on z and PL/1 support

• UrbanCode Deploy

• Simplified z/OS application deployment by providing OOTB

support to automate JCL submission and monitoring

• Plugins for CICS, DB2, and IMS to enable use of predefined

actions/steps during the deployment process

• Rational Team Concert

• New component history, change history views, and new

search command to find strings in native ISPF

• Upgraded integration with UC – RTC for z customers to

generate deployment packages for UC

Secure Managed Cloud Services – RD&T and CLM


So how could we do this on the mainframe?• Modernize the Developer Workbench

• Get very flexible test environments, which can be used by projects for “small scale testing” off the mainframe

• Virtualize backend/3rd party services, so we can test without access to “everything”

• Get better test data management, or virtualize your database with “mockup data”

• Run small scale tests of modules (with zUnit) and Components (with Rational Test Workbench)

• Until we have complete coverage of automated test scripts, use RDz Code Coverage to help the developers perform “just enough testing”.


Revitalize Skills! Use modern tools for multiplatform development

Boost developer productivity

Systems of Engagement

Systems of Record

Collaborative Development

• Standardize on common Eclipse-based IDEs for all types of development

• Refactor and extend back-end services and data for optimal mobile

experience

• Use code coverage, code governance, and unit test support for improved

quality

• Leverage rich program understanding and control flow analysis for

onboarding

• Exploit fully integrated source level debugger for increased productivity

• Interactive debugging of your applications

• Root cause analysis of your application failures (abends)

• Management of your application data

• Performance analysis of your applications

• Quality assurance of your applications

Flemming PetersenDevOps for Enterprise Systems, IBM Systems Nordic

November 2015

Agile Development on System Z

agile development on system z

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