1. The document discusses different application architectures like monolithic, microservices, and serverless. 2. It notes challenges with monolithic applications like scalability issues and difficulty in testing and deployments. Microservices improve on this but introduce new challenges around dependencies and capacity management. 3. The document defines serverless as functions that run in response to events, scale automatically, and are paid for only when run. It lists advantages like no provisioning or administration needed, built-in scalability, security, and logging.

1. Serverless
@karthikdivi

2. Few questions to understand the audience
1. How many of you are building serverless ?
2. How many of you are building micro services ?
3. How many of you are building Monolithic applications ?
4. How many of you are running your Monolithic applications on your own hardware ?

3. Monolithic applications on your own hardware
● All for one and one to fail
● Team collaboration problems
● Testing is pain
● Less frequent updates
● Scalability issues

4. Monolithic applications on cloud
● All for one and one to fail
● Team collaboration problems
● Testing is pain
● Less frequent updates
● Scalability issues

5. Micro services
Good
● More frequent rollouts
● No single point of failures
● Easy testing and deployments
● Polyglot
● New team members become productive quickly
Not so good
● Web servers, Dependencies, Frameworks
● Autoscaling not out of the box
● Capacity management, security
● Logging and monitoring
● Time to start

6. What is Serverless?
Functions that run in response to events,
auto-scale for you, and only charge you when
they run.
Ex: AWS Lambda, Google Cloud Functions

7. Advantages
● No provisioning
● No Administration
● Scalability out of the box (Scale up & Scale down)
● Logging, Monitoring, Security all out of the box
● High availability
● Zero time to start
● Cheap - Million requests costs less than 1$
- Focus on your code

8. Real world use cases
● Webapp backends
● Mobile app backends
● Image processing
● IOT data processing
● CRON Jobs
● Webhooks
- Almost any microservice

9. Example Code
function helloWorld(req, res){
res.send(“Hello World!”);
}
exports.helloWorld = helloWorld;
$ gcloud beta functions deploy helloWorld --trigger-http --stage-bucket karthikdivi-functions-bucket

10. Alexa Clone Demo
‘Amazon Alexa’ Clone, demo using Google cloud functions

11. Q&A
Use case discussions…..