aws lambda: how glide uses aws lambda for increased simplicity, scale and speed - pop-up loft tel...
TRANSCRIPT
AWS LambdaMo Kamioner, Backend Architect
בס”דMarch 13, 2016
Installed on 20M+ devices worldwide
Millions of active users
have sent billions of messages
1PB+ videos stored on S3
10K+ r/w throughput in Dynamo DB
Multi region architecture ensures
sub-second latency
Analytics 1.0
User Redshift
Foreground EC2
Dynamo DB
MySQL
Background EC2 S3 SQS Analytics EC2
Duplicate data (consistency issues)
Difficult to make changes
2+ hours from creation to Redshift
Multiple DB writes per request
Analytics 2.0
User Redshift
Foreground EC2
Dynamo DB Lambda S3 SQS Analytics EC2Kinesis Firehose
Duplicate data (consistency issues) Consistent data (found new bugs)
Difficult to make changes Deploy to Lambda is simple
2+ hours from creation to Redshift 15 minutes max
Multiple DB writes per request One database write
Why Lambda?
• Low maintenance
• Already work in NodeJS
• No database connections (sleek)
• Easily deployable
• Highly scalable
10 Practical Lambda lessons learned
JSLint your code
Douglas Crockfordhttp://www.jslint.com
> jslint badExample.js
badExample.js #1 'notName' was used before it was defined. if (notName === "Mudd") { // Line 5, Pos 5
"use strict";
var name = "Douglas Crockford";
if (notName === "Mudd") { console.log("Your name is Mudd!");}
badExample.js
> jslint goodExample.js
goodExample.js is OK.
"use strict";
var name = "Douglas Crockford";
if (name === "Mudd") { console.log("Your name is Mudd!");}
goodExample.js
Declare variables outside the handler
“Avoid declaring any function variables outside the scope of the handler. Lambda does not guarantee those variables will be refreshed between function invocations”
AWS Lambda Best Practices March 2016
"use strict";
function mapDataLoadOnce(data) { //...}
doInitOnce();
module.exports.handler = function handler(event, context) { function mapDataLoadOnEveryInvocation(data) { //... // `event` and `context` are in scope here }
doInitOnEveryInvocation();
//...
context.succeed("Successfully processed " + event.Records.length + " records.");};
lambda.js
Expect multiple events
Track versions of your code
Screenshot of version tracking
Know when to use the code editor
Keep your functions
light and fast
128 MB is more than you think...
Stream your data!
https://gist.github.com/maxrabin/e3e51abc365cd3f54d78
Don’t Ignore Errors
Watch your timeouts
Live demo!
Takeaways
Lambda is simple, scalable and fast
1. JSLint your code2. Declare variables outside the handler3. Expect multiple events4. Track versions of your code5. Know when to use the code editor6. Keep your functions light and fast7. 128 MB is more than you think…8. Stream your data!9. Don’t ignore errors
10. Watch your timeouts
