IT EFFICIENCY
25 MARCH 2016
Mainframe
Downsizing
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Remarks:
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GFT Technologies SE and GFT Italia s.r.l..
1. The business challenge
2. Addressing the challenge
3. Examples of successful approaches
4. Benefits of working with GFT
The business challenge
Downsizing makes it possible to migrate legacy
applications from an expensive technology platform
such as a mainframe to a cheaper one – like an
Intel-based platform, for instance – while at the same time
maintaining at least the same level of performance and
security:
Cost reduction - Downsizing the mainframe reduces
operational outlays (such as license costs and
maintenance costs) by using productivity tools.
Personnel costs are also lower because less
technical staff is required.
Ease of data migration - The migration process to
the new system includes the conversion of obsolete
data storage systems to relational databases. This
opens the possibility to access data using SQL,
instantly making the task of accessing data much
easier.
Improve performance - Performance can be
improved thanks to open-platform technology by
simplifying database access and a better integration
of other IT systems.
Key findings
•
The size of mainframe organizations evaluating migrations
of some or all their workloads, as measured in millions of
instructions per second (MIPS), has grown dramatically in
the past two years, to around 2,000 to 3,000 MIPS and
higher.
•
Downsizing has emerged as a relatively low-cost, low-risk
approach to shifting workload quickly and saving on
hardware and software costs.
•
Code transformation technology has improved dramatically
over the last several years and is often used to shift
workload to newer platforms and languages, while
preserving its inherent business value.
Recommendations
•
Consider downsizing when the existing applications still
represent valid commercial business processes or
government agency missions.
•
When shifts to modern platforms also imply greater interest
in newer languages, evaluate code transformation
solutions to evolve the application from legacy skills
dependencies.
•
Rewriting existing business applications offers the greatest
flexibility, albeit at the greatest cost and risk.
1. The business challenge
2. Addressing the challenge
3. Examples of successful approaches
4. Benefits of working with GFT
Value Argumentation
Value Proposition Summary
The downsizing practice allows to migrate a
legacy application from an expensive
technology platform such as a mainframe to a
cheaper
one like an Intel based platform,
maintaining at least the same level of
performance and security.
The downsizing is made through a GFT
framework
that delivers methodology, tools
and resources to respond to this demand,
maintaining application stability and IT
system integrity using a Rapid Technological
Evolution approach vs. IT Platform Big Bang
Value Statements
•
High quality migration
through the usage of GFT
automatic software analysis and generation architecture
called GET –
GFT Enterprise Transformation
•
Testing
is facilitated by the use of the same data of the
legacy applications
•
Maintenance costs reduction
through the usage of
productivity tools
•
Database access simplification
•
Better integration
with the other IT systems
•
Technology innovation
with no impact to the final users
•
Value retention
: the migrated application implements
exactly the same application logic of the original
application that has been developed over the years of
maintenance / enhancements
GFT Group © GFT Technologies SE and GFT Italia s.r.l. 2016 | All rights reserved. 25/03/2016 7
Addressing the challenge
The GFT Mainframe Downsizing offering is composed of the following services:
Assessment - In order to define a modernization strategy that is in line with the customer goals and, at the
same time, in line with the business and IT requirements, the project begins with an assessment that will
clearly identify the scope of the supply, highlighting the criticalities of the project and giving a correct size of
the total cost and duration of the project
Proof of Concept (PoC) - The assessment can be completed with a Proof Of Concept project, to certify the
results that have been defined during the assessment phase.
Source Code Transformation – Most of the times, a downsizing project requires changes in the applications
to better fit to the landing platform. Source Code Transformation has a great advantage compared to rewriting
the application, because it retains the value of the original business logic: cheaper and safer!
This is possible through GET (GFT Enterprise Transformation) Architecture that is composed of a set of tools and software
components that are customized depending on the specific project requirements.
GET Technology is a GFT asset, that means that all required customizations and changes can be done directly by GFT.
GET Technology offers automatic generation of a new version of source code from a pre-existing source code basing on
defined conversion rules.
Conversion rules can be applied to make automatic changes on the code (i.e. enlarge a field) or even to change the language
(i.e. from COBOL to Java)
Addressing the challenge
Testing – is one of the most important service of a downsizing project. A well organized test phase will
identify all the problems before the go-live that will be easier. Depending on the criticality of the
application, the testing phase can arrive to be defined as a parallel run, where the original and
destination environments applications are ran with the same data, and results (data – reports and
messages) will be compared to highlights possible differences
Go-Live – Go-live planning, tests and support are part of the go-live service
Post Go-Live support – a defined period of assistance is normally planned after the go-live phase.
The first phase of the go-live support is normally performed on-site. After the migrated applications are
considered stable, another period of on-call support can be planned.
1. The business challenge
2. Addressing the challenge
3. Examples of successful approaches
4. Benefits of working with GFT
Project Example – TV Advertising Company
IT System migrated from main frame with MVS to a UNIX system
2000+ APS programs migrated to organized and structured Cobol programs
170 DL/I segments converted into Oracle tables 30 VSAM indexed files converted into Oracle tables 800 MVS JCLs converted into korn shells.
Main frame scheduler replaced by a UNIX
scheduler, all interfaces with external system have been reengineered
All programs tested first by GFT resources (unit and integration testing) then by the customer team (UAT)
Results:
Saving: more than 60%
All programs are now written in Cobol that makes the maintenance easier
More flexibility: all application data are now stored in a relational DB that makes extremely easy to be accessed from external
The challenge
The IT System was hosted in outsourcing by an important international player and it was much expensive. Also the 80% of the applications were written in APS, a Cobol generator that was acquired by the company to
standardize and speed up the developments. Those kinds of tools were quite diffused in 80s.
Targets:
Saving
Remove the constraint of APS because of the difficulty to find resources with the correct skills on the market
The outcome
The engagement
Scope:Project of 1 year with a team of 4 resources, migration to an open platform and conversion from APS to structured Cobol.
Key Factors:
Support of customer technical and functional team (for testing)
Involvement of specialized GFT team with high technical skills
Usage of GFT syntax analyzers and conversion tools Delivery through a consolidated migration methodology
GFT Group © GFT Technologies SE and GFT Italia s.r.l. 2016 | All rights reserved. 25/03/2016 11
Project Example – Oil & Gas Italian Company
IT System migrated from CCC with a proprietary operating system to a UNIX system
10.000+ batch and online Cobol programs converted 1.000+ indexed files converted into 600 Oracle tables
2.500 OS JCLs converted into korn shells. Proprietary TP Monitors (2 different types) have been rewritten using C language to be run under UNIX environment
All programs tested first by GFT resources (unit and integration testing) then by the customer team (UAT)
Results:
The new systems are now running on open platform servers, that have been structured to grant a high availability of the service.
With new CPUs the performances have been increased by 5 times
Unrequested but appreciated result: saving of 30%
The challenge
The Oil & Gas company had 6 different local IT application systems to manage the 6 production plants in Italy. The applications were hosted by specific hardware and operating systems (CCC - Concurrent Computer Corporation) with big problems of reliability and huge performance problems.
Targets:
Increase the reliability Improve the performance
The outcome
The engagement
Scope:6 Projects for a total of 2 years with a team of 4 resources, migration from CCC to an open platform.
Key Factors:
Support of customer technical and functional team (for testing)
Involvement of specialized GFT team with high technical skills
Usage of GFT syntax analyzers and conversion tools Reuse of most of the customized tools after the first project
Project Example – Gas Turbine French Company
IT System migrated from main frame with DOS/VSE to a UNIX system
6.000+ batch and CICS Cobol programs converted and 200+ Assembler programs reengineered 230 multi-record VSAM indexed files converted into 600 Oracle tables
1.300 DOS/VSE JCLs converted into korn shells. Custom developed scheduler migrated to the new platform, CA utility DRET rewritten in C language to be operational on UNIX. All interfaces with external system have been reengineered
All programs tested first by GFT resources (unit and integration testing) then by the customer team (UAT) Results
Saving: more than 70%
The new system is now running on an open platform with same security level and increased performance, granting the continuity of the service
More flexibility: all application data are now stored in a relational DB that makes extremely easy to be accessed from external
The challenge
The full IT System was hosted in a mainframe with a very old version of the operating system, managed by a French public company, that communicated to the customer that the mainframe outsourcing service would have been discontinued in a short time. They had to choose to move the system AS IS to a new mainframe somewhere, or to start a downsizing project.
Targets:
Grant the continuity of the service Saving
The outcome
The engagement
Scope:Project of 1 year with a team of 4 resources, migration to an open platform.
Key Factors:
Support of customer technical and functional team (for testing)
Involvement of specialized GFT team with high technical skills
Usage of GFT syntax analyzers and conversion tools Delivery through a consolidated migration methodology