Two Categories of Clouds
• Can be either a (i) public cloud, or (ii) private cloud
• Private clouds are accessible only to company employees
• Public clouds provide service to any paying customer:
– Amazon S3 (Simple Storage Service): store arbitrary datasets, pay per GB-month
stored
• As of 2018: 1-4 c per GB month
– Amazon EC2 (Elastic Compute Cloud): upload and run arbitrary OS images, pay
per CPU hour used
• As of 2018: 0.5 c per CPU hr to $5.4 per CPU hr (depending on strength)
– Google cloud: similar pricing as above
– Google AppEngine/Compute Engine: develop applications within their appengine
framework, upload data that will be imported into their format, and run
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