puting (英文PPT).ppt

puting
Evolution puting work (1/2)
work puter (client - server)
Separation of Functionalities
puting
Tightly puting resources:
CPU, storage, data, etc. Usually connected within a LAN
Managed as a single modity, Open source
Evolution puting work (2/2)
puting
Resource sharing across several domains
Decentralized, open standards
Global resource sharing
puting
Don’t puters, puting power
Upload, run, download
Ownership model
The Next Step: puting
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
puting
Definition
puting is a concept of using the 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 puting Cloud (EC2), Google MapReduce, Science clouds
Provide platform for running science code
Host Cloud
Google AppEngine
Highly-available, fault tolerance, robustness for web capability
Services are not known geographically
puting Example - Amazon EC2
http://aws./ec2
puting 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
http://code./appengine/