OpenSocial and Google App Engine
Technical Overview

Paul McDonald
Product Manager, Google App Engine
pmcdonald@google.com

Google App Engine

We run web applications
We handle the entire lifecycle of an app
Apps are run on Google infrastructure

1. Scalable Serving Infrastructure
2. Python Runtime
3. Software Development Kit
4. Web based Admin Console
5. Datastore

Authenticate with Google Accounts
Memcache
Send E-Mail
Transform Images

Billing and Expected Pricing
Free Quota Price
500 MB Storage FREE
5 Million Pageviews per Month FREE
Additional Resources Price
CPU ($ / core-hour) $0.09 - $0.12
Storage ($ / GB-month) $0.15 - $0.18
Bandwidth - Outgoing ($ / GB transferred) $0.10 - $0.14
Bandwidth - Incoming ($ / GB transferred) $0.10 - $0.12

Patrick Chanezon
OpenSocial API Evangelist
chanezon@google.com

Cloud Computing

Google App Engine
\"We will encourage you to develop the three great virtues of a
programmer: laziness, impatience, and hubris .”
Larry Wall, Programming Perl (1st edition), Oreilly And Associates
Works for Python programmers too:-)
Larry and Guido (Credits Tim Bray http://www.tbray.org/ongoing/)

Google App Engine for OpenSocial
Social App’s main issue: when viral growth kicks in, how do you
scale your app?
OpenSocial persistence API limited in volume and capability
Create an App Engine app as your backend
makeRequest() to call back your server, can be signed
Lane Liabraaten’s article about how to do that
http://code.google.com/apis/opensocial/articles/appengine.html

Questions