Google App engine – a PaaS Purist
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Google App Engine is a platform as a service (PaaS) that provides elasticity by allowing applications to scale up and down automatically based on usage. It achieves this through a stateless architecture where application servers can handle requests from any user, and the state is stored externally in a database. This allows instances to be shut down when not in use without losing session data. By moving state to a scalable NoSQL database like Bigtable, App Engine is able to achieve scalability to handle large traffic spikes or slashes.
Google App engine – a PaaS Purist
- 1. Google App engine – a PaaS Purist Mani Doraisamy Founder, Guesswork.co
- 2. Agenda Why do we need PaaS? How does it work? 1 2 3 Hands on with App engine
- 3. Owning is the root cause of all “evil” Businesses shouldn’t own software. They should rent them! "Story of a disciple who became a landlord"
- 4. But, Cloud didn’t invent that idea! ASPs understood the need. But did not know how to execute it :-( Hotels ASPs Cloud
- 5. So what did Cloud invent ? It invented elasticity!
- 6. Why elasticity? ‘Elasticity’ makes ‘Pay-per-use’ (renting) model viable! Growth Slashdot effectSharing
- 7. Agenda Why do we need PaaS? How does it work? 1 2 3 Hands on with App engine
- 8. 4 years of Computer Science in 2 words Process Data
- 9. What is a process? The magic that controls the processor! Programmer Process Programming language
- 10. What is data? Database Lives inside for years! It is called “durability” Data
- 11. Working with state Variables Process is intelligent. It makes sense out of data. We call it the “state”! Structures Objects
- 12. Where does the state live? Memory Somewhere between Memory and Hard disk Hard Disk Replicate
- 13. Introducing multi-tenancy State suffers with workaholics
- 14. Stateless – You can request anybody! Move “state” to the database! Now, Send request to any server. Shut down unwanted.
- 15. What does the poor database do? When app servers start pushing “state” to the database!
- 16. App engine: Stateless + NoSQL = Scale Frontend Instances BigTable
- 17. Agenda Why do we need PaaS? How does it work? 1 2 3 Hands on with App engine