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The Cloud

Or cloud computing… or the end of executive headaches…

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Imagine…

• You have your own startup company that develops graphics

• You buy computers and software for your employees…

• That is not enough!

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Cloud computing

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You are already using it!

• HotMail, Gmail, Yahoo!Mail• Blogger• Flickr• Facebook?• Twitter?• MyITLab???

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So what is really the cloud?

• It comes in many shapes and sizes…– Just like the clouds in the sky!

• Common terms:– Software as a Service (SaaS)

cloud application services, such as word processing or a spreadsheet.

– Platform as a Service (PaaS)allows the user to run applications without the cost and complexity of buying and managing the underlying hardware and software layers.

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Different kinds of clouds

• Public (or external) cloud• Community cloud• Hybrid cloud• Private (or internal) cloud

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Quiz!

• Other clouds and cloud apps that you have used?

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How does the cloud work?

• Two sections:– Front end: client’s computer– Back end: powerful computers that serve • From data processing to video games!

– They connect through the network

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On the back end (servers)

• Protocols• Middleware

allows networked computers to communicate with each other.

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Problems with servers

• Energy waste• Storage– Space– Redundancy!

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Why is the cloud useful?

• Access application from anywhere anytime• Lowers hardware cost– Netbook!

• Save money and space for businesses• Save money on IT support• Take advantage of processing power– Grid computing

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Problems?

• Security• Privacy• Reliability

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Collaboration in the Cloud

• Google docs• Windows Live SkyDrive• Apple’s iCloud• Google wave