Zylog Legacy Application Migration Presentation 12042011

8/6/2019 Zylog Legacy Application Migration Presentation 12042011

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Introduction

ToZylog Systems Limited (ZSL)&

Legacy Application Modernization


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Core Competency / Services


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Zylog - Evolution

1996

Opened ODC Chennai

Opened USA office

2004

Zylog Europe

incorporated

2007

Zylog IPO through

BSE/NSE

2008 - 2010

4 companies acquired

2006-7

$93m Turnover

2007-8

$153m Turnover

2008-9$151m Turnover

2009-10

$219m

Turnover

Zylog - Growing,Profitable,well-managed mediumsized softwarebusiness.


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Corporate InformationIncorporated as Public Limited Company (June 1995).

Turnover $200m+ (2010), Operating profit 19% of total revenue

3000+ Developers (Java, C#, OpenSource)


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Partial Customer List


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Example Vertical Market - Telecoms


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Technology Stack Partners

300+ Software DeveloperCertifications

Microsoft

Oracle

IBM


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Main Development Centre

75,000 sq ft, approx 750 Developers


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Main Development Centre

Floors 2 and 3, each with 250 275 Production staff + support staff & Facilities


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Legacy Application Modernization Department


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Meeting Rooms


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Modernization Practice Data Centre


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Core Competency / Services


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Business Problems

Business agility is restricted bysoftware systems

Software progress reduced bycomplexity

Business has to continue whileimprovements are made


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Modernization DriversBusiness Opportunity

Obsolescence

Skills Shortage

Cost Reduction

Wider Access

Architecture Alignment

Integration with other services


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Application Options


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The problems with COTS PackagesHighly Invasive tobusiness operation

Highly invasive to ITprocedures

Causes organizations to/bend to suit the package

Benefits lower thanexpected

Costs higher thanexpected

Av ERP system costs0.5m to licence

Av ERP system costs 0.5to implement

Av ERP system costs 5mto maintain over its lifetime

Benefits lower thanexpected

Future flexibility is limitedby the ERP vendor


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Cornell University and Cutter Survey - 2006

98% of customers forced to change businessprocesses

COTS packages fully implemented only 28% of times

81% of companies reported using a great deal of effortusing COTS application with existing data

77% of companies reported using a great deal of effortintegrating aCOTS application with other applications

61% of companies reported preferring the customlegacy application to the new COTS application

Only 18% of respondents said it had been easy torealize benefits from the COTS application


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Modernization OptionsOption Category Characteristics Cost/Time

1. Manual Re-write Expensive Time-Consuming Risky Quality, Native Solution

High Cost Long Duration

2. Modernization(Semi-Automatic)

Protects investment inbusiness logic

30%-40% of ManualCost & Duration

Quality, Native Solution Moderate Risk Re-Architected

Modernized Enhanced Future-Proof solution

Moderate Cost Moderate Time Low Maintenance cost

3. Automated CodeConversion

No Re-Architecture (4GLC/S to C/S Java/.NET)

Poor Scalability Poor Integration

Low Migration cost High Maintenance cost


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Modernization Benefits

Business Opportunity

Protect existing investment

Mitigate Risk

Minimize Business Disruption

Minimize IT Dept Disruption


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Manual v Automatic Migration MetricsDeveloperCost 400 perday

160 LOC per day

500K LOC App requires156 man months

DeveloperCost 400 perday, 8k per month

500K LOC costs

1.25m

DeveloperCost $400per day

400 LOC per day

500K LOCApp requiresmin 62 man months

Developer cost 400per day, 8k per month

500K LOC costs

0.5m

(+ Re-Architecture and Modernization work)


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Legacy Application Modernization


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IT Portfolio ManagementCreate inventory of Applications

Map applications to the enterprise model

Drill down to detailed mappings

Identify areas for action

Manage IT portfolio via, planning,evaluation and management


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Replace/Rewrite ScenarioManagement Decision taken to replace/re-write

Overall approach still to be determined

Rewrite? Migrate? Automated migration?

Evaluate Options

Identify preferred solution

Implement preferred approach


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Architecture Consolidation Scenario

IT Architecture constantly evolves

Applications need to re-align

Applications need to integrate

Abstract and re-use commonfunctionality

Create efficient new platform


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Model Driven Migration ScenarioApplication architecture becomesinefficient

Initiative to model the Application

Model enables improvements to meidentified

To-Be Architecture Defined

Re-Architecting / Re-Factoring occurs


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Interface Modernization Scenario

Quick win scenario

Improve usability

Automate new business processes

Consolidate older green screens

Replace shadow systems


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SOA TransformationEstablish SOA policy

Establish target architecture

Implement SOA Technology & Standards

Re-factor selected applications using SOA

Develop new applications using SOA


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Data Conversion ScenarioData structures evolve

Data structure needs converting

Data is to be migrated

Data access code changes

App Architecture does not change


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Language/Platform Migration Scenario

Driven by Technologicalobsolescence

Driven by standardized applications

No functional improvement

No data redesign


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Lift & Shift Migration Scenario

Convert one language or compiler to another

Eliminates a language, compiler or platform

No architectural change

Often driven by IT cost reduction

Can create an emulation environment


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Aspects of Modernization


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7 Stage Modernization Process


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3 Architectural Domains


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Zylog Transformation Framework


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Model Based Transformation


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Modernization ToolingMicrosoft TeamSystem

VSTS ArchitectEdition

VSTS DeveloperEdition

VSTS Test Edition

Visual Studio

Language Specific Tools

Language Parser

Output Templates

Modelling Tool

Coding Standards Tool


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Typical Legacy Application (e.g. Oracle Forms)

518 Tables / 228 Views

125 DB Functions

36 DB Packages

305 DB triggers

380 Oracle Forms

66 Forms Libraries (OracleDesigner)

375 Oracle Reports

Oracle Forms 4.5

.

.

.

.

.

.


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Typical Architectural DecisionsN-tier, Scalable, Performant, Secure

MVC / MVVM Framework (C#/NET Java)

WPF, Silverlight, Ajax, Flex

Loose coupling between tiers (SOA)

Service Orientation (WCF / RIA)

Performance / Caching

Reliability

Availability

Portability


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Oracle Forms to Java migration


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Code Transformation


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Source/Target Transformation


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Modernization Team Deployment

Customer Site

London (Zylog)

Chennai (Zylog)

- Balance deployment locations and price


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Engagement Model


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Case Study Government Legal dept

Source Application

Oracle FormsInformationManagementSystem

Target Application

N-Tier Java AppIBM ExecutionEnvironment


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Government Benefits ApplicationBenefit Eligibility

Benefit Determination

Client correspondence, Mgt Reports

Workflow-based Application

1000 Screens in Application

Java EE, Oracle/ADF/Tuxedo


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Electrical RetailerPowerBuilder Legacy 4GL Solution

Distributed Databases

Reducing synchronization window

Limiting new shop opening schedule

Target: C# .NET Framework application

Aggressive shop openings


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sl com

Workflow Doc Mgt System

Legacy 4GL Application

POC Stage 1

Full migration to Java/Linux (36 depts, 400 users)

Integrated with Open Office

Built-in scripting engine

Dynamic Fields/Screens

Flexible Workflow driven application

Case Study Solothurn Switzerland

Documents

Zylog Legacy Application Migration Presentation 12042011