RedisConf19

1. Serverless + Redis != Stateless
Avner Braverman
Binaris CEO

2. The future is Serverless

3. On-Prem Cloud Serverless

4. Ride sharing Serverless
Infrastructure Someone else's car Never manage servers
Cost Pay per ride Pay per CPU time
Ease of use Focus on your phone Focus on business logic
Who can use? No driver's license No cloud expertise

5. myFunction()
exports.handler = () => {
return 'hello, world!';
};

6. Key providers
Google
Cloud Functions
IBM
Cloud Functions
AWS
Lambda
Azure
Functions
Binaris

7. Serverless Map-Reduce

8. map()
map()
map()
reduce()
Data
Data
Data
Result

9. 1. Spread random points inside a
square
2. Geometry tell us that
Circle area ~ # red points ~ π∙R2
Square area ~ # points ~ 4∙R2
3. Compute:
π = 4 * (# red points) / (# points)
R
Calculating π using the
Monte Carlo method:

10. exports.computePiReducer = ({ inputs, points }) => {
return 4 * inputs.reduce((a, b) => a + b) / points;
};
exports.computePiMapper = ({ points }) => {
let inside = 0;
// repeat points times:
for (let i = 0; i < points; i++) {
// random point (use R = 1)
const x = Math.random() * 2 - 1;
const y = Math.random() * 2 - 1;
// is it inside the circle?
if (x * x + y * y < 1) {
inside++;
}
}
return inside;
}
function mrController(...) {
}
① Data
② Map
③ Reduce
// invoke mappers
// wait for completion
// invoke reducer
// return result

11. What about failures?
What about retries?

12. function mrMapper(...) {
}
function mrAsyncController(...) {
// add map commands to stream
}
Stream
function mrMapper(...) {
}
function mrMapper(...) {
}
computePiMapper()
computePiReducer()
// invoke user mapper
// save output
// increase counter
// if complete:
// invoke user reducer

13. Demo

14. github.com/binaris/functions-examples

15. Serverless is great for code
Redis is great for state
Cosmic ✨ scale without the rocket 🚀 science
Pay as you go
Binaris and Redis are a great combo (especially if you need speed)
avner@binaris.com @avnerbraverman
Serverless + Redis != Stateless
Meet us at the
developer lounge