Cloud_Computing_(英文PPT).pptVIP

Cloud Computing Evolution of Computing with Network (1/2) Network Computing Network is computer (client - server) Separation of Functionalities Cluster Computing Tightly coupled computing resources: CPU, storage, data, etc. Usually connected within a LAN Managed as a single resource Commodity, Open source Evolution of Computing with Network (2/2) Grid Computing Resource sharing across several domains Decentralized, open standards Global resource sharing Utility Computing Don’t buy computers, lease computing power Upload, run, download Ownership model The Next Step: Cloud Computing Service and data are in the cloud, accessible with any device connected to the cloud with a browser A key technical issue for developer: Scalability Services are not known geographically Applications on the Web Applications on the Web Cloud Computing Definition Cloud computing is a concept of using the internet to allow people to access technology-enabled services. It allows users to consume services without knowledge of control over the technology infrastructure that supports them. - Wikipedia Major Types of Cloud Compute and Data Cloud Amazon Elastic Computing Cloud (EC2), Google MapReduce, Science clouds Provide platform for running science code Host Cloud Google AppEngine Highly-available, fault tolerance, robustness for web capability Cloud Computing Example - Amazon EC2 /ec2 Cloud Computing Example - Google AppEngine Google AppEngine API Python runtime environment Datastore API Images API Mail API Memcache API URL Fetch API Users API A free account can use up to 500 MB storage, enough CPU and bandwidth for about 5 million page views a month /appengine/ Cloud Computing Advantages Separation of infrastructure maintenance duties from application development Separation of application code from physical resources Ability to use external assets to handle peak loads Ability to scale to meet user demands quickly Sharing capability among a large pool of users, improving ov