The document discusses cloud computing, including definitions, benefits, challenges, and considerations for large enterprises adopting cloud solutions. Cloud computing offers potential cost savings and flexibility but also risks regarding security, compliance, and vendor viability. Migrating applications requires evaluating their suitability for the cloud and modernizing architectures. A phased, hybrid approach can help enterprises transition while ensuring current IT environments remain future-proofed.

1. Cloud Computing: Hindernisse und Chancen für Großunternehmen CMG-AE John Rhoton Distinguished Technologist EDS Office of the CTO / 30 April 2009

2. Agenda Definition von Cloud Computing? Ecosystem, Marktlandschaft und Reife Vor- und Nachteile Praktische Überlegungen

3. Was bedeutet “Cloud Computing”? The 451 Group: “The cloud is IT as a Service, delivered by IT resources that are independent of location” Gartner: “Cloud computing is a style of computing where massively scalable IT-related capabilities are provided ‘as a service’ across the Internet to multiple external customers” Forrester: “A pool of abstracted, highly scalable, and managed infrastructure capable of hosting end-customer applications and billed by consumption” Wikipedia: “A style of computing in which dynamically scalable and often virtualized resources are provided as a service over the Internet. Users need not have knowledge of, expertise in, or control over the technology infrastructure "in the cloud" that supports them. ” “ A large pool of easily usable and accessible virtualized resources (such as hardware, development platforms and/or services). These resources can be dynamically reconfigured to adjust to a variable load (scale), allowing also for an optimum resource utilization. This pool of re-sources is typically exploited by a pay-per-use model in which guarantees are offered by the Infrastructure Provider by means of customized SLAs.” Vaquero, Rodero-Merino, Caceres, Lindner

4. Cloud Elemente Externe Stellfläche Firewall-extern Zugriff über Internet On-Demand Skalierbar Elastisch Abrechnung nach Nutzen Multi-tenant Virtualisiert Als Service verfügbar Ortsunabhängig SOA? Grid? Web 2.0? Private versus Public Cloud

5. Hype Cycle

6. Across the Chasm Web Services Web 2.0 Laggards Bowling Alley Tornado Main Street Early Market Internet Mobility Cloud Computing Virtualization Geoffrey Moore: Crossing the Chasm. Collins 2002 Innovators Early Adopters Late Majority Early Majority

7. Cloud Model Integration Operation Governance Hardware Computation Storage Memory Colocation Real Estate Cooling Power Bandwidth Virtualisation Provisioning Billing Virtualisation Platform Programming Language Development Environment APIs Application CRM UC Email ....... .......

8. Cloud Landscape Governance Operation Integration Infrastructure Platform Application

9. Cloud-orientierte Applikationen Service-orientierte Architektur Service abstraction, reusability, composability Loose coupling Non-latency sensitive Not bandwidth intensive Horizontale Skalierung Parallelisable workload Statelessness Daten isolieren Standardisierte Schnittstellen

10. Vorteile von Cloud Computing? Kostenreduktion Benefit from economies of scale and experience curve Predictability of spend Avoids cost of over-provisioning Reduction in up-front investment Risiko-reduktion Offload risk or running the data-centre, data protection, and disaster recovery Reduces risk of under-provisioning Kernkompetenz Reduce effort and administration related to IT Automatic service evolution Flexibilität Roll-out new services, retire old Scale up and down as needed; quickly Faster time to market: Lower barriers to innovation Access from any place, any device, any time

11. Herausforderungen Finanzielle Struktur Return on Investment, Payback period Risiko Security, Privacy Interoperability, Portability Reliability, SLAs Business Continuity, Vendor viability Compliance Integration Enterprise integration, Application integration Multi-customer support Organisation

12. Konkrete Vorgangsweise Planen Cloud Platform auswählen Mögliche Provider bewerten Applikationen auf (Cloud-) Eignung prüfen Applicationen modernisieren Langfristige Kapitalausgaben überprüfen Hybrid und Interoperabilität Business Case berechnen Risiko bewerten Consider: Transition Operation Governance

13. Zusammenfassung Der Begriff „Cloud Computing ist noch nicht eindeutig definiert Aber das hindert uns nicht daran es einzusetzen Cloud Computing verspricht viele Vorteile Enterprisevorteile können teilweise von Private Cloud abgedeckt werden Cloud Computing ist noch im Wandel Privacy, Service-levels, Interoperabilty Der Umstieg auf Cloud Computing erfordert eine grundlegen andere Architektur Es gibt auch jetzt schon Möglichkeiten im Enterprisebereich Aber die wichtigste Herausforderung ist die heutige Umgebung zukunftssicher zu machen

14. Weitere Informationen Presentation posted to: http://www.slideshare.net/rhoton Any other questions? <firstname.lastname>@gmail.com More about the presenter: http://www.linkedin.com/in/rhoton More about HP cloud services http://www.hp.com/go/cloud