CSCE 470 Lecture 14

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Web APIs

Examples:

• Twitter
• Flickr
• Google Maps
• Facebook
• Foursquare
• Yahoo Boss API (like a bawss)
• Wikipedia
• Youtube
• and many others...

Most have rate limits (e.g. Twitter is 150 API calls per 15 minutes)

Cloud Computing and MapReduce

History

Before clouds, there were

• grids
• vector supercomputers
• etc.

Could mean many things today: in particular, Large data processing

Rich, interactive web applications

• "clouds" are servers that run them
• AJAX is de facto standard
• e.g. Facebook, YouTube, Gmail, ...

Utility Computing

• Computing resources as a metered service ("pay as you go", flexible spending per month)
• Ability to dynamically provision virtual machines
• Scalability up to "infinite" capacity
• Scaling on demand

Everything as a Service

• Utility = Infrastructure as a Service (IaaS)
• Platform as a Service (PaaS)
  • Give me a nice API and take care of maintenance
• Software as a Service (SaaS)
  • Just run it for me

Commodity Clusters

A bunch of linux boxes dedicated to just doing stuff for the cloud