cloud-computing-backup

8/7/2019 Cloud-Computing-backup

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CLOUD COMPUTING AND SERVICEORIENTED ARCHITECTURE

Anup Kumar, Professor

Alok Srivastava, Senior Consultant

Mobile Information Network and Distributed Systems (MINDS)

University of Louisvilleand

Microsoft Corporation


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THE CLOUD


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4

Distributed Application

Architecture

Distributed Application

Architecture

Data tier

Client tier

Business tier 1

BOBO

Business tier 2

Web Server EJB Container

WAP

Server


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Era of Cooperative Computing

Technological evolution that accelerates the ongoing Internet revolution

Platform-independent, Internet-based RPC

Evolving to new distributed computing model for the Internet

Key value: simplicity

Allows semantic integration, access to existing business processes andtransactions

Business revolution

New product/service distribution models

New Internet revenue models

Tighter linkage to customers and partners

Webs of value, changes to competitive structure


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Characteristics of Web

Services Web services are self-describing

Use XML-based description language

Clients can discover Web services and invoke their functionality

Allows creation of new Web services using the existing Webservices

Web services provide

Interoperability among distributed applications that spans

over different hardware and software

Uses HTTP and XML-based communication

Allows flexible integration of Web and component-baseddevelopment


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Web Service Ingredients

Web Service

Developer

Web ServiceRegistry

Service Client


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Evolution of Computing

Grid Computing Resource sharing across several domains

Decentralized, open standards

Global resource s

h

aring

Utility Computing

Dont buy computers, lease computing power Upload, run, download

Ownership model


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Cloud v/s Non-Cloud


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Interaction Models for Computing

Personal Computer

One to One

Client/Server

One to Many

Cloud Computing

Many to Many


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What Power Cloud ComputingProvides?

Commodity Hardware

Performance: single machine not interesting

Reliability Most reliable hardware will still fail: fault-

tolerant software needed

Fault-tolerant software enables use of

commodity components Standardization: use standardized machines to

run all kinds of applications


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What Power Cloud ComputingProvides?

Infrastructure Software

Distributed storage:

Distributed File System (GFS) Distributed semi-structured data

system

BigT

able Distributed data processing system

MapReduce

What is the common issues of all these software?


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Features of Operating System for

the cloud

Hardware Abstraction across multiple servers

Distributed Scalable, Available Storage

Deployment, Monitoring and Maintenance Automated Service Management, Load

Balancers, DNS

Programming Environments Interoperability

Designed for Utility Computing


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Benefits of Cloud OS?

OSTakes care of your service in the cloud

Deployment

Availability

Patching

Hardware Configuration

You worry about writing the service


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Features of Cloud OS

Automated Service Management

Computation Resource Allocation

Storage Resource Allocation

User friendly Development Environment


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Service Models

Describes your Service


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Cloud Datacenter

Your ServiceYour Service

Service Architecture

L

B

Internet

Web Site(ASPX, ASMX, WCF)Web Site

(ASPX, ASMX, WCF)Web Site(ASPX, WCF)

WorkerService

WorkerService

L

B

StorageTables

Blobs

Queue


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Design Considerations

Scalability and availability are the design points

Storage may not be a relational database

Stateless Stateless front ends, store state in storage

Data structures to decouple components

Instrumentation capability for your application

Once you are on - stay on

Easy patching & updates


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The Roadmap

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