Final

Agenda
Objective Cloud Computing Architecture Characteristics Advantages Public,Private and Hybrid Clouds Type of Services Cloud Computing Components Technical Issues Cloud Service Taxonomy Disadvantages Conclusion

Objective
To provide a general overview of cloud computing including: •What are some of the issues we should consider? •Why should this be important to us?

What is Cloud Computing?
• Cloud computing is a way of computing, via the Internet, that broadly shares computer resources instead of using software or storage on a local PC. Cloud = Internet. • Not to be confused with
• Grid Computing – a form of distributed computing • Cluster of loosely coupled, networked computers acting in concern to perform very large tasks • Utility Computing – packaging of computing resources such as computing power, storage, also metered services • Autonomic computing – self managed

Architecture

Cloud Service

Cloud Platform

Cloud Infrastructure

Cloud Storage (Database)

5 Essential Cloud Characteristics
• On-demand self-service • Broad network access (Internet) • Resource pooling – Location independence • Rapid elasticity • Measured service

Advantages of Cloud Computing
 Reduced Cost
 Performance  Scalability

Public, Private & Hybrid Clouds

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Public Cloud Services
Definition – The standard cloud computing model • The SP makes resources, such as applications and storage,available to the general public over the Internet – Free or offered on a pay-per-use model • Examples of public clouds – Amazon Elastic Compute Cloud (EC2), IBM's Blue Cloud, Sun Cloud, Google AppEngine and Windows Azure Services Platform.

Private Cloud Service
• Internal cloud or corporate cloud • Definition – Proprietary computing architecture that provides hosted services to a limited number of people behind a firewall. • Designed to appeal to an organization that needs or wants more control over their data than they can get by using a third-party hosted service

Type of Services

Cloud Computing Components
Applications
Facebook · Google Apps · SalesForce · Microsoft Online Browser(Chrome) · Firefox · Cloud · Mobile (Android · iPhone) · Netbook (EeePC · MSI Wind) · Nettop (CherryPal · Zonbu) BitTorrent  · EC2 · GoGrid · Sun Grid · 3tera App Engine · Azure · Mosso · SalesForce Alexa · FPS · MTurk · SQS S3 · SimpleDB · SQL Services  · Atom · HTML 5 · REST

Client

Infrastructure Platforms Services Storage Standards

Technical Issues of Cloud Computing
 Virtualization Security
 Reliability  Monitoring  Manageability

Cloud Service Taxonomy
Layers
 Software-as-a-Service (SaaS)

 Platform-as-a-Service (PaaS)  Infrastructure-as-a-Service (IaaS)  Data Storage-as-a-Service (DaaS)

Software-as-a-Service (SaaS)
•Definition – Software deployed as a hosted service and accessed over the Internet • Features – Open, Flexible – Easy to Use – Easy to Upgrade – Easy to Deploy

Platform-as-a-Service (PaaS)
Definition • Platform providing all the facilities necessary to support the complete process of building and delivering web applications and services, all available over the Internet • Entirely virtualized platform that includes one or more servers, operating systems and specific applications

Infrastructure-as-a-Service (IaaS)
Definition • Provision model in which an organization outsources the equipment used to support operations, including storage, hardware, servers and networking components • Infrastructure as a Service is sometimes referred to as Hardware as a Service (HaaS). • The service provider owns the equipment and is responsible for housing, running and maintaining it • The client typically pays on a per-use basis

Data Storage as a Service (DaaS)
• Definition – Delivery of data storage as a service, including database-like services, often billed on a utility computing basis • Database (Amazon SimpleDB & Google App Engine's BigTable datastore) • Network attached storage (MobileMe iDisk & Nirvanix CloudNAS) • Synchronization (Live Mesh Live Desktop component & MobileMe push functions) • Web service (Amazon Simple Storage Service & Nirvanix SDN)

Cloud Computing Benefits
• Agility – On demand computing infrastructure • Linearly scalable • Reliability and fault tolerance • Self healing – Hot backups, etc • SLA driven – Policies on how quickly requests are processed • Multi-tenancy – Several customers share infrastructure, without compromising privacy and security of each of the customer’s data • Service-oriented – compose applications out of loosely coupled services. One service failure will not disrupt other services. Expose these services as API’s • Virtualized – decoupled from underlying hardware. Multiple applications can run in one computer • Data, Data, Data 19 • Distributing, partitioning, security, and synchronization

• Simple • Transparent => need to “see” into the cloud • Scalable => complexity often limits scalability • Secure => limits adoptability • Extensible • New application classes and service classes may require new features • Clouds are new => need to extend while retaining useful features • Easy • To install => system administration time is expensive • To maintain => system administration time is really expensive

Contd..

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Contd..
• Extensibility
• Simple architecture and open internal APIs

• Client-side interface
• Amazon’s AWS interface and functionality (familiar and testable)

• Networking
• Virtual private network per cloud • Must function as an overlay => cannot supplant local networking

• Security
• Must be compatible with local security policies

• Packaging, installation, maintenance
• system administration staff is an important constituency for uptake
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Additional Cloud Characteristics
• Cloud computing often leverages:
– Massive and Rapid scalability – Virtualization – Resilient computing – Low cost software – Geographic distribution, (many
datacenters)

– Service orientation – Advanced security technologies

Disadvantages of Cloud Computing
 Must have stable internet  Slower than local software  Concern about reliable and security

Cloud computing open issues
 Governance • Security, Privacy and control • SLA guarantees • Ownership and control  Reliability • Good servive provider with 99.999% availability  Data Security  Cloud locking and Loss of control • Plan for moving data along with Cloud provider

Contd..
 Cost?  Simplicity?  Controls on sensitive data? • Out of business  Big and small • Scalability and cost outweigh reliability for small businesses • Big businesses may have a problem

Conclusion
• Cloud computing is the fastest growing part of IT • Tremendous benefits to customers of all size • Cloud services are simpler to acquire • Public and private clouds may be used in combination