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cloud computing

(cloud computing)""Cloud computing(Distributed Computing)(Grid Computing)1999SETI@home500

Grid Computing

Utility ComputingITSoftware as a ServiceCloud Computing

Office

https://www.google.com/hostedhttp://smallbusiness.yahoo.com/email/www.zimbra.com

many others

Word

www.writely.comwww.writeboard.comwww.inetword.commany others

Spreadsheetswww.numsum.comwww.irows.commany others

Databasewww.dabbledb.comwww.Lazybase.comwww.quickbase.commany others

www.buildonline.comwww.blinksale.commany others

Document Mgmtwww.pxn8.com www.pixoh.commany othersGraphics

www.linkedin.comwww.plaxo.commany others

Contacts

Project Mgmt.www.basecamp.comwww.jot.comwww.dreamfactory.commany others

Gartner(Cloud Computing Services)(Cloud Computing Technologies)Amazon EC2

Cloud Computing

(Data Center)GoogleiGoogleGoogle Calendar

IaaSPaaSSaaSIaaSInfrastructure as a Service()PaaSPlatform as a Service()SaaSSoftware as a Service()Increasingly popular with SMEs No hardware or software to manageService delivered through a browserPlatforms are built upon Infrastructure, which is expensiveEstimating demand is not a science!Platform management is not fun!Full OS accessFirewallsRoutersLoad balancing

Windows GoogleAmazon Yahoo..Amazon : Web ServiceAWSAmazon EC2Small (Default) $0.10 per hour $0.125 per hourAll Data Transfer $0.10 per GBAmazon S3$0.150 per GB first 50 TB / month of storage used $0.100 per GB all data transfer in$0.01 per 1,000 PUT, COPY, POST, or LIST requestsPaying for What You Use

13Google : App Enginegoogle500MB of storageup to 5 million page views a month10 applications per developer account LimitLanguage: PythonJavaweb applicationsWindows : AzureWindows Azure Azure .Net servicesSQL servicesLive services

Yahoo : HadoopApache Yahoo 2006Hadoop20082Hadoop21Hadoop5 Petabytes1

15eIT-3D ()/(99)(98)24 WWW (98)2010(2010 Horizon Report K-12 Edition)-IRS(Interactive Response System)e2/19

274/19HP DL785 1

285/1922-

30/123

VM/(Node Cluster)(SpO2ECG)6/19

7/194(;)

8/195(Citrix XenServer)

9/196ClientDeviceGateway(Thread)GatewayECG(Cloud Controller)5(Node_VM)10/19

11/19

()(Node)12/19-

13/19

16/1918/1939

Cloud Computing

.

IT-

201190%(2008-201197)!!