# App Engine - [Main page](https://cloud.google.com/appengine/) # Tech thinks to remember - Platform as a Service - Well suited for microservices - Can run containers - Has a cron engine ## Standard - pre-configured containers - secure sandbox - cannot connect to outside resources - Autoscale happens in seconds - Pricing based on instance hours - Languages: - Python - Java - PHP - Go - Node.js - Ruby ## Flexible - Runs customised containers - 1 minute to load vs seconds for Standard - price based on CPU, memory, disk - can connect to on-prem computers - even via VPN ## Scaling - Automatic, based on request rate, latency - Basic is create a instance when there is a call - Manual is a fixed number of instances - Configured by app.yaml ## Traffic Splitting - based on client IP - stick - http cookies - more precise stick. - random