Cloud Computing 101

Cloud computing is more than a computer in the Cloud

Mainframe PC Client-server Internet ASP Cloud Computing

The cloud is the metaphor for the internet Dynamically scalable virtual infrastructure and services SaaS Grid Utility ASP Web2.0

Grid Distributed computing Cluster of networked, loosely coupled computers acting in concert to perform very large tasks Cloud computing is not just ..... Mathematical ly intensive applications – weather forecasting, engineering, biotech

Hosting infrastructure Packaging of computing resources as a metered service Cloud computing is not just ..... Utility Web hosting, enterprise DR

Application Hosting Shared instance of application or software service Cloud computing is not just ..... SaaS ASP

SaaS Grid Utility ASP Web2.0 Cloud computing has elements of all these ..... And more Automatically scalable resources Platform services Cloud middleware Virtual desktop

Utility Computing Platform as a Service (PaaS) Cloud-based User Applications Source: Tim O’Reilly A possible definition of cloud computing

A services cloud computing platform

Characteristics of a cloud application .... Failure resistant Not too security critical Scalable horizontally Not heavily inter-connect intensive Inherently aware of cloud infrastructure

Examples of types of cloud applications .... Processing Pipelines Batch Processing Websites Files Images Videos Indexing Data mining Back office Reports Code builds Testing Web Applications Temp websites Seasonal websites

Cloud application design considerations .... On-demand scalability Component scalability Loosely coupled components Implement parallelism Re-boot and re-launch Use queues to manage system state and integrity Resilient design

Phase 1: Early Clouds Based on proprietary and internal cloud infrastructures

Phase 2: Vertical Supply Chains Rise of new cloud services providers who leverage on other cloud providers

Phase 3: Horizontal Federation Providers will collaborate and federate horizontally to provide more scale for customers

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