Application modernization is an important topic for many organizations today. Many businesses believe that in order to modernize mainframe applications they need to migrate and rewrite those applications in order to achieve the cost, speed, and ongoing innovation they are looking for. The reality is that this can be accomplished faster and at a lower cost and with less risk with a more measured strategy that leverages the strengths of the IBM Z platform and its role as a full participant in IBM’s hybrid cloud model.

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ModerniZation:
The applications’ modernization on IBM Z
Sébastien GEORIS (NRB) Information System Architect
Head of Mainframe Architecture
Aymeric AFFOUARD (IBM) Certified IT Specialist in Digital Transformation
IBM Z API enablement

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Agenda
• Why and how can we do an application’s modernization on Z
• Example with a new application architecture
M o d e r n i Z a t i o n : T h e a p p l i c a t i o n ’ s m o d e r n i z a t i o n o n I B M Z

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M o d e r n i Z a t i o n : T h e a p p l i c a t i o n ’ s m o d e r n i z a t i o n o n I B M Z

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M o d e r n i Z a t i o n : T h e a p p l i c a t i o n ’ s m o d e r n i z a t i o n o n I B M Z
Application's modernization does not mean you have to move off IBMZ
Perceived challenges With IBM Z in hybrid cloud
Lack of available talent Eliminate the talent gap between IBM Z and other platforms
Slow time-to-market Bring a consistent DevOps experience and cloud native
development techniques
Data trapped in the Mainframe Easily acces IBM Z data without moving off-platform
High upfront costs Optimize costs with a hybrid cloud platform that extends to IBM Z

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M o d e r n i Z a t i o n : T h e a p p l i c a t i o n ’ s m o d e r n i z a t i o n o n I B M Z
From historical to Domain Driven Design service -oriented architecture
‘Historical’ Model
To-be
Domain 1
As-Is
Domain 2
Domain 2
Domain Driven Design Model
Transformation

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M o d e r n i Z a t i o n : T h e a p p l i c a t i o n ’ s m o d e r n i z a t i o n o n I B M Z
The Solution Building Blocks

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M o d e r n i Z a t i o n : T h e a p p l i c a t i o n ’ s m o d e r n i z a t i o n o n I B M Z
High Level Application Architecture Design

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M o d e r n i Z a t i o n : T h e a p p l i c a t i o n ’ s m o d e r n i z a t i o n o n I B M Z
Interoperability Java <-> PL/1 // Cobol
Interoperability

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M o d e r n i Z a t i o n : T h e a p p l i c a t i o n ’ s m o d e r n i z a t i o n o n I B M Z
Perceived challenges With IBM Z in hybrid cloud
Lack of available talent • New application architecture Domain Driven Design
• Java on Z with historical languages interoperability
• RESTfull API’s with z/OS Connect
Slow time-to-market • New programming Framework (PL/1 // Cobol // Java)
• Dynamic update of business Rules adressed by IBM ODM
• DevOps chain on Z (see Benoît presentation)
Data trapped in the Mainframe • Build canonical business objects directely within the Mainframe’s
• Business Layer and expose them as REST ressources from Z
• z/OS Connect allows to expose directly data for read operations
High upfront costs • Hybrid cloud plateform interacts with Z as a service provider
throught z/OS Connect RESTfull API’s
• Java workload off-loaded on zIIP processors
Conclusion

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