Cloud Migration

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.