1) The document discusses migrating IT infrastructure and applications into cloud computing platforms like Amazon Web Services, Google Apps Engine, and Microsoft Azure. 2) It presents a seven step iterative model for migrating into the cloud that includes assessing applications and infrastructure, developing a cloud architecture and migration plan, executing the migration, and testing in the cloud environment. 3) Key challenges of migrating to the cloud include identifying and mitigating risks, especially those related to security, as well as ensuring quality of service as defined in service level agreements around issues like data ownership, transfer, and storage.

1. Chapter – 02
Migrating into a Cloud

2. Introduction
• Large cloud computing IT vendors like Google,
Amazon and microsoft
• They were charging user fees very attractive
pricing models
• It is a “techno commercial distributive business
model” of using distributed large scale data
centers either private or public or hybrid offerng
customers a scalable virtualized infrastructure or
an abstracted set of services qualified by service
level agreement(SLA)

3. The Promise of the Cloud
• Pay per use- Lower Cost Barriers
• On Demand Resources –Autoscaling
• Capex vs OPEX – no capital expenses (Capex) and only
operational expense (OPEX)
• SLA driven operations – Much Lower TCO
• Attractive NFR support: Availability, reliability
Cloudonomics
• ‘Infinite’ Elastic availability- Compute / Storage/ Bandwidth
• Atomatic Uaage monitoring and Metering
• Jobs/Tasks virtualised and Transparently ‘Movable’
• Integration and interoperability ‘support’ for hybrid ops.
• Transparently encapsulated & abstracted IT features
Technology

4. The Cloud Service Offerings and
Deployment Models
• Abstract Compute/Storage/Bandwidth
Resources
• Amazon Web services[10.9]-
EC2,S3,SDB,CDN, cloudWatch
IaaS
IT folks
• Abstracted Programming Platform with
encapsulated infrastructure
• Goople Apps Engine(java/Python),
Microsoft Azure, Aneka[13]
Paas
Programmers
• Application with encapsulated
infrastructure & Platform
• Salesforce.com, Gmail, yahoo,Facebook,
Twitter
SaaS
Architects & Users

5. Challenges in the Cloud

6. Migrating into the Cloud
Why Migrates?
• Cloud is a techno-business model”
• Large-scale effort in several enterprises in
leveraging the cloud
• Cloudonomics deals with economic leveraging
• Economic and business enterprise
• Adoption or integration with cloud services is
a migration

7. • Cloud develop a new architecture
– Levels of applications
– Code, design architecture and usage.
P P’C + P’l P’OFC+ P’l
P : before migrating data center
P’C : after migrating into cloud(hybrid)
P’l : local data center
P’OFC : optimized for cloud

9. Seven Step Model of Migration into a Cloud

10. Iterative Seven Step Model of
Migrating into the Cloud

11. Iterative Seven Step Model of
Migrating into the Cloud

12. Risk & Challenges
• Risk are identified and mittigated
• It can splited into two steps
– General migration
– Security related migration
• QoS : Quality of Service on SLA’s like
ownership, transfer and storage.