AWS Lambda is a new compute service that runs your code in response to events and automatically manages compute resources for you. In this webinar you’ll learn what you need to quickly begin building mobile, tablet, or IoT applications that use AWS Lambda as a serverless back-end. You’ll also hear about Amazon Web Service’s Event-Driven Compute strategy and see demonstrations that use Lambda to respond to events from Amazon S3 notifications and Amazon DynamoDB streams. We’ll cover key Lambda features, its programming model, and tips on getting the most out of Lambda functions. Learning Objectives: • Understand key AWS Lambda features • Learn the AWS Lambda programming model • Get tips on getting the most out of AWS Lambda Who Should Attend: • Developers, Dev-ops Engineers, IT Operations Professionals

1. © 2015, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Tim Wagner, AWS Lambda General Manager
April 30, 2015
AWS Lambda: Event-driven
Code for Devices and the Cloud

2. Event-Driven Compute in the Cloud
Launched last November at re:Invent
• Lambda functions: Stateless, request-driven code execution
• Triggered by events in other services:
• PUT to an Amazon S3 bucket
• Write to an Amazon DynamoDB table
• Record in an Amazon Kinesis stream
• Makes it easy to…
• Transform data as it reaches the cloud
• Perform data-driven auditing, analysis, and notification
• Kick off workflows

3. Data Triggers: Amazon S3
Amazon S3
Bucket Events
AWS Lambda
Original
image
Thumbnailed
image
1
2
3

4. Data Triggers: Amazon DynamoDB
AWS LambdaAmazon DynamoDB
Table and Stream
Send SNS
notifications
Update another table

5. Dynamic content generation based on
incoming news text and images
Real time log processing for
prediction analytics
Thumbnailing installation site
photos for mobile use
Real time processing and recording of
inbound traffic from a range of social
media platforms
Large scale distributed search
across blog content
Operational analytics and
real time troubleshooting

6. Building Backends with Lambda
Mobile Compute
• Request/response
• AWS Mobile SDK
• Easy Personalization
…for devices
…for end users
AWS LambdaMobile App

7. Event-Driven Compute in the Cloud and for Devices
Request / response
• Create instantly scalable backends for mobile apps
• Run stateless computations for web apps without servers
• Build cloud-based IoT ecosystems using C/C++ libraries
• Complements the existing asynchronous functionality

8. AWS Mobile SDK
Build high quality mobile apps quickly and easily.
AWS Lambda now available in:
• AWS mobile SDK for Android
• AWS iOS mobile SDK

9. Easy Personalization
Which app/device is she using?
Which end user is this?
Name and version of app,
Make and model of device,
Platform and local, …
Cognito identity,
Cognito identity pool?
?

10. Demo: Building a Mobile
Backend with AWS Lambda

11. No Infrastructure to Manage
Focus on business logic, not infrastructure
Upload your code; AWS Lambda handles
• Capacity
• Scaling
• Deployment
• Monitoring
• Logging
• Web service front end
• Security patching

12. Automatic Scaling
Lambda scales to match the event rate
Don’t worry about over or under provisioning
Pay only for what you use
New app or successful app, Lambda matches your scale

13. Bring Your Own Code
Create threads and processes, run
batch scripts or other executables,
and read/write files in /tmp.
Include any library with your
Lambda function code, even
native libraries.

14. Fine-Grained Pricing
Buy compute time in 100ms increments
Low request charge
No hourly, daily, or monthly minimums
No per-device fees
Never pay for idle
Free Tier
1M requests and 400,000 GB-s of compute.
Every month, every customer.

15. Using AWS Lambda

16. Calling Lambda Functions
Call from mobile or web apps
• Wait for a response or just send an event and keep going
• AWS SDK, AWS Mobile SDK, REST API, CLI
Send events from Amazon S3 or SNS:
• One event per Lambda invocation, 3 attempts
Process DynamoDB changes or Amazon Kinesis records as events:
• Ordered model with multiple records per event
• Unlimited retries (until data expires)
Default limits
• 100 concurrent executions and 1,000 invokes per second
• Increases available via AWS customer service!

17. Writing Lambda Functions
The Basics
• Stock node.js
• AWS SDK comes built in and ready to use
• Lambda handles inbound traffic
Stateless
• Use S3, DynamoDB, or other Internet storage for persistent data
• Don’t expect affinity to the infrastructure (you can’t “log in to the box”)
Familiar
• Use processes, threads, /tmp, sockets, …
• Bring your own libraries, even native ones

18. Configuring the Lambda Functions
1. Pick a name.
2. Pick a size.
• Set memory to any size from 128MB to 1GB, in 64MB steps
• Receive an equivalent portion of other resources (disk, network, compute
power, etc.)
• Easy, single-dial solution to set price/performance preference.
• Lambda tells you how much memory you used, so you can tune this setting.
3. Pick an event source (or several).

19. AWS Lambda or EC2 / ECS?
AWS Lambda
• Request-driven
• Prioritizes ease of use – one
OS, default hardware choice
• AWS owns and manages the
infrastructure
• Implicit scaling; just make
requests
Amazon EC2 and ECS
• Infrastructure rental
• Flexible – choose instance
type, OS, language, …
• You own and configure the
infrastructure
• Scale by provisioning
instances or containers

20. New Features

21. New AWS Event Sources for Lambda
Amazon Simple Notification Service (SNS)
• Easily target, route, transform, filter, or audit messages
• Trigger an AWS Lambda function by sending it notifications
• Turn Amazon CloudWatch alarms into actions
Lambda
Function
SNS

22. New AWS Event Sources for Lambda
Amazon Cognito
• Before: Easily synchronize user data across their devices
• Now: Take action when that data changes
• Examples: Verify and respond to game state updates
Lambda
Function
Cognito

23. How Can You Use These Features?
“I want to send
customized
messages to
different users”
SNS + Lambda
“I want to send an
offer when a user
runs out of lives in
my game”
Cognito +
Lambda + SNS
“I want to transform
the records in a
click stream or an
IoT data stream”
Kinesis + Lambda

24. New Features
Cross-account access support
• Create functions that you can share with others
• Send events from S3 buckets in a different AWS account
AWS CloudTrail integration
• Track AWS Lambda API calls in AWS CloudTrail logs
• Audit access logs easily with a Lambda function
AWS CloudFormation Custom Resources
• Run a Lambda function any time you create, update, or delete a
CloudFormation stack
• Easily run custom actions without provisioning infrastructure

25. Improved Metrics and Diagnostics
Discover and take action with free metrics
• AWS Lambda automatically monitors your functions
• Amazon CloudWatch metrics for requests, errors, running time
• New concurrent request throttle metric
Automated logging with time-based sorting
• AWS Lambda automatically logs for you
• Sort CloudWatch Logs by time of last entry
• See creation time in log stream names and easily filter on it

26. Coming Soon: Java!
You can already call Java programs from Lambda functions
today…
• Java and other languages are automatically included in your
filesystem view…don’t wait to start using them!
• Freezing ensures you don’t pay repeatedly for JVM boot
We’ll make this even easier with built-in support for AWS
Lambda functions written in Java.

27. Three Next Steps
1. Go to the AWS console to create and test your first Lambda
function. The first 1M requests each month are on us!
2. Use AWS Lambda to add custom logic to S3, DynamoDB,
SNS, Kinesis, or Cognito events…no servers required!
3. Use the AWS Mobile SDK and Lambda to quickly create an
instantly scalable mobile app. Start by visiting
http://aws.amazon.com/mobile/sdk

28. Visit http://aws.amazon.com/lambda, the AWS
Compute blog, and the Lambda forum to learn
more and get started using Lambda.
Thank you!