AWS Lambda is a serverless compute service that lets you run code without provisioning or managing servers.
Lambda runs your code only when needed and scales automatically, from a few requests per day to thousands per second.
You pay only for the compute time you consume - there is no charge when your code is not running. ### limitation (per region)
memory: 128MB - 10GB (more memory, need more vCPU)
max execution time: 15 minutes
environment variables: 4KB
/tmp directory storage: 512MB to 10GB
concurrent executions: 1000
deployment package: 50MB (zipped)
deployment package: 250MB (unzipped)
snapstart
lambda@edge / cloudfront functions
Lambda@Edge
DynamoDB
Amazon DynamoDB is a fully managed, serverless, key-value and document database that delivers single-digit millisecond performance at any scale.
standard table: high availability, durability, and performance
IA table: infrequently accessed data
max item size: 400KB
provisioned mode, on-demand mode
DynamoDB Accelerator (DAX)
Amazon DynamoDB Accelerator (DAX) is a fully managed, highly available, in-memory cache for DynamoDB that delivers up to a 10x performance improvement - from milliseconds to microseconds - even at millions of requests per second.
microseconds latency
no need to modify application
DynamoDB Streams
DynamoDB Streams is an optional feature that captures data modification events in DynamoDB tables.
can trigger lambda function, SQS, Kinesis
24 hours retention period
limit: 5 active streams per table
Global Tables
Amazon DynamoDB global tables provide a fully managed solution for deploying a multi-region, multi-master database, without having to build and maintain your own replication solution.
automatic replication
must enable DynamoDB Streams
backup and restore
Point-in-Time Recovery
Point-in-time recovery helps protect your DynamoDB tables from accidental write or delete operations.
restore to any point in time within 35 days
the recovery process creates a new table
on-demand backup
restore to any point
the recovery process creates a new table
API Gateway
Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale.
Edge-optimized API: global, use CloudFront
Regional API: regional, use API Gateway
Private API: VPC endpoint
Step Functions
AWS Step Functions is a serverless function orchestrator that makes it easy to sequence AWS Lambda functions and multiple AWS services into business-critical applications.
Amazon Cognito
Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily.
