Ashish Pradhan - Legacy Systems & SOA - Interop Mumbai 2009

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Historically, the ROI for SOA has been measured based on the quick ‘time to market’ and the ‘reuse of assets’ that it provides. This session presents a fresh perspective on Legacy Systems, as an extreme case of SOA, and attempts to show enterprises how by merely identifying (not creating) the right envelope around the existing legacy-assets, the dream and benefits of SOA can easily be achieved by the business.

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Ashish Pradhan - Legacy Systems & SOA - Interop Mumbai 2009

  1. 1. LEGACY SYSTEMS & SOA (If you have a Legacy System, your journey to SOA is half-complete!) Ashish Pradhan Pradhan.Ashish@gmail.com Disclaimer October 21, 2009 The views expressed here are solely the author's and should not be attributed to InterGlobe Technologies or its clients.
  2. 2. Introduction: Mainframes, SoA & Legacy GOAL: All of us here understand SOA & we know Legacy- Mainframes. What relationship do they share with each other? • Over the next 15-mins, let’s explore that & it’s significance to an organization that uses a Legacy-MF Mainframes (MFs) are still around & how! • Movement to SOA has so far ignored MFs • At best, MFs have been reluctant participants Smarter action: Bring them into SOA • MFs need SOA + SOA needs MFs! My Definition of legacy: • If you do not speak SOA, you are legacy! • Corollary: If your MF speaks SOA, you are not legacy! 2
  3. 3. Origin of SOA for Legacy? 2009 2001 Opportunity exists to go 2006 ‘True Mainframe SOA’ Web Services started evolving in the distributed-platforms Web Services for MFs got (SOA was nowhere to implemented through rigid, be seen) 2004 proprietary interfaces The SOA experts on the distributed-systems had no knowledge of MF applications; the MF There was pressure to expose Web Services application experts had no knowledge of SOA from MFs too (SOA had started gaining good- (Both ignored each other!) support on the distributed-systems) It will not be wrong to say. . . For MFs, SOA did not evolve at all – Only Web Services happened! 3
  4. 4. Business Environment: Influence on SOA If SOA never evolved for Legacy system MFs . . .Is that bad? • Absolutely NOT. In fact, that is the opportunity now! SOA for distributed-systems evolved faster & has now become a victim to the hype that was created by vendors of SOA products • Inability to measure ROI tangibly for SOA has further fuelled talks • Lessons learnt here serve as valuable inputs to SOA for MFs With the economic-downturn in 2009, obituaries have started appearing about SOA • Tens-of-blogs and articles are proclaiming- ‘SOA is Dead’ • What is the truth? ? ? 4
  5. 5. Business Environment: Influence on SOA (contd) The truth is: • The term, ‘SOA’ may have fallen off books for a section of business- sponsors; but the principles of ‘service-orientation’ it proclaims are extremely relevant today! • SOA is also transforming itself and becoming more nimble, small & transparent! w c do mi n ow o sl co n E Cloud SOA Metamorphosis SaaS No separate SOA Infrastructure (Mainframe Hosted SOA Solutions) 5
  6. 6. SOA is only a concept: View Legacy differently! At the risk of sounding very simplistic, I say: ― We have got a basic SOA in place by just viewing the legacy-system differently! 6
  7. 7. Why SOA for Mainframes? Legacy-MF houses the enterprise’s assets in it! • Not reusing these assets through newer-channels (eg. Telephony (Text- to-speech data-announcements), e-Commerce, etc) is a waste! • Having a point-to-point interface is not a sustainable clean-approach • A good SOA implementation addresses both of these effectively We want Enterprise SOA, not SOA for distributed systems only! • All parts of the organization should be able to find & leverage MF-assets • A functional SOA implementation with minimal/no MF participation has limited benefits to the organization SOA for MF is the secret weapon of the CIO running an organization with legacy-MF • Remain business competitive for M&A • Integration of legacy platforms/consolidation becomes a breeze • SOA can be implemented while leveraging MF-hardware- no new boxes! 7
  8. 8. Past journeys of so-called, ‘SOA for MFs’ Common observations across the industry • Used hand-coded scripts /programs to move data from their MFs to other platforms or databases (‘Info-Integration Challenge’) • Only a very small % of enterprise data from MF was exposed through Web Services • Had problems identifying which legacy programs could be turned into a Web Service and exposed • MF Application programmers did not understand SOA/Web Services; the SOA experts from distributed-systems did not understand the MF- applications! • MF acted as a Server exposing Web Services; Never as a consumer! • Application Servers resided on another platform & accessed MF 8
  9. 9. Recent developments in SoA for MFs Common observations across the industry Key points: • Transform MF into a full-fledged SOA participant • MF can be both: A provider of enterprise services & a consumer • MF can act as a Service Intermediary • MF can now house the SOA Infrastructure; no external hardware • Data integration tools: Provide reliability & scalability Scenarios: • MFs that were Web Services enabled 5-years back do not have a complete SOA framework • Should these MFs jump & now embrace ‘True MF SOÁ’? — NO! Learnings of past do not recommend a standalone investment in SOA. It is a strategic decision not tactical! • Time the SOA-implementation to ride-along with a big-turnkey business project (Eg. M&A) 9
  10. 10. Using MF for SOA Infrastructure Key observations in support: • Inherent benefits of MF: performance, reliability & high-availability • No additional hardware investment necessary • Several Mainframe SOA solutions exist today from IBM & Vendors • IBM has taken steps to support SOA initiatives on MF IBM has introduced ‘Speciality Engines’ on MF: zIIP & zAAP • zIIP: System-z9 Integrated Information Processor • zAAP: System z Application Assist Processor • IFL (Integrated Facility for Linux) : Run Linux on MF (i.e. zLinux) 10
  11. 11. Speciality Engines on MFs Speciality Engines Advantages: • ‘Qualified load’ can be passed to ‘Speciality Engines’ – This load does not count against MIPS usage!! • Reduces load on GPP (General Purpose Processor) thereby reducing TCO • No speed capping on Specialty Engines (Not restricted to GPP speeds)! • Examples of Qualified Load: ― DB2 Processing & DB2 Queries ― Data-integration/transformation on MF for SOA ― XML Parser: Marshalling & De-marshalling ― JAVA Runtime: Consume External Web Services A game-changer from IBM: Speciality Engines • A vendor’s MF-SOA Solution that leverages Speciality Engines makes sense! 11
  12. 12. In Summary . . . A legacy-system today is no longer a challenge in the journey towards SOA Including the Mainframe as an active-participant in the SOA journey, creates an exciting opportunity to revitalize & rejuvenate the organization! 12
  13. 13. About ….. InterGlobe Technologies Part of India’s largest Travel Conglomerate– InterGlobe Enterprises(IGE) • India’s leading Value-based carrier: Indigo Airlines, belongs to our group Service Offerings • IT- Solutions & Services • Business Process Outsourcing / Off shoring Global delivery model to service clients across multiple locations • Expertise in Mainframe, Legacy environment • Application development & Maintenance services • SOA-enablement • Web Services Domain expertise • Travel, Transportation & Hospitality • Finance Copyright © 2009 InterGlobe Technologies 13

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