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Google App Engine - From Wikipedia, the free encyclopedia
“Google App Engine is a platform for developing and hosting web applications in Google-managed data centers.”
“Google App Engine is cloud computing technology. It virtualizes applications across multiple servers.”
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Cloud computing
Cloud ComputingWTF ?!
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Cloud Computing – the motivation
Real world utilization 5%-80%
100% utilization is impossible: • Black Friday sales• Verizon & iPhone campaign
Over-provisioning
Demand
Capacity
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urc
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Demand
Capacity
t1 2 3Under-provisioning
Demand
Capacity
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On demand, scalable
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To make a long story short – cloud computing is
Develop More
Maintain Less
Force you to write a scalable-by-design applications
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“Google App Engine enables you to build and host web apps on the same systems that power Google applications”
“App Engine offers fast development and deployment; simple administration, with no need to worry about hardware, patches or backups; and effortless scalability”
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Google AppEngine – core components
Development tools
Software Development
Kit
“BigTable” like data
store
Scalable Hosting Platform
Admin Console
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Development Tools
• IDE (IDEA, Eclipse, etc…) plugins • Local Web Server Stub• Local Datastore Stub• Local administration console• Tones of samples
Hello AppEngineServlets & JSPs
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Google AppEngine SDK & Sandbox
DATASTORE
IMAGE MANIPULATION
MAIL SERVICE
AUTHENTICATION & AUTHORIZATION
TASKING & QUEUING
URL FETCHING
XMPP
CACHING
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JoinsJoins
DistributedDistributed Key ValueKey Value Shared NothingShared Nothing
GOOGLE APPENGINE DATASTORE
GOOGLE APPENGINE DATASTORE
SQLSQL
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Scalable Hosting Platform
SCALABLE HOSTING PLATFORM ADMIN CONSOLE
12Active Analytics
Local Data StoreLocal Admin Console
Local Data StoreLocal Admin Console
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Cloud Computing Landscape / discussion
Infrastructure Cloud
Platform Cloud
Application Cloud
Locked-in Some Portability
Full Portability
Cloud type
Portability
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