This document discusses migrating applications to the cloud. It begins by defining cloud computing as a network of servers sharing resources over the internet in an elastic manner. It then outlines the main cloud service models: Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). The document lists features applications require for the cloud environment, such as being architecture-agnostic and service-oriented. It stresses that applications should consider data security and transfer limits. Finally, it states that migrating applications to the cloud requires analyzing them for performance, design, security compliance, and other concerns.

1. Cloud Computing
Migrating your app to cloud
Presented By: Azhar Khan

2. Agenda:
 Cloud computing
 Cloud Service
 Application features required for Cloud environment
 Application migration planning

3. Cloud computing
 Network of servers on the Internet for sharing resources.
 Elastic resources i.e. we scale up or down the resources as per our demand.

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Cloud service
 Software as a Service (SaaS)
 Platform as a Service (PaaS)
 Infrastructure as a Service (IaaS)

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Cloud service
Software as a Service (SaaS)
 Software on demand & subscription
based licensing.
 E.g.: Microsoft Office 365, Google
Apps etc.
Advantages:
 No need to purchase software &
their frequent updates.
 Eliminates the data center cost.
 High scalability.
Disadvantages:
 Dependency on the service provider.

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Cloud service
Platform as a Service (PaaS)
 Platform to develop, maintain and run
applications without maintaining the
infrastructure, middleware frameworks,
database etc.
 E.g.: Windows Azure, AWS etc.
Advantages:
 Various benefits in application testing &
deployment.
 Backup & recovery as a part of service.
 Highly scalable and dynamic allocation
based on geo-locations.
Disadvantages:
 Data security
 Integrating PaaS with in-house systems.`

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Cloud service
Infrastructure as a Service (IaaS)
 Infrastructure, dedicated or virtual servers.
 E.g.: Windows Azure, Amazon EC2 etc.
Advantages:
 Various resources like firewalls, load
balancer, VM disk image etc.
 Highly scalable infrastructure.
Disadvantages:
 Off-premise data storage.

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Application features required for Cloud
 Architecture should not be specific to any
topology
 Designed to take advantage of parallel
architecture of cloud
 Design should consider the quantity of
data transferred to the various clients (i.e.
mobile, web etc.) as client may have limited
bandwidth
 Data security is a major concern, so proper
measures should be taken
 Service-Oriented architecture should be
adopted

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Application migration planning
 Analyzed technically for performance,
design, data security etc.
 Enterprise should consider the compliance
issues, security concerns etc.

10. Queries....