Wisp Hill

Design HPA

1 min read

aws hpa design-hpa

Global Accelerator vs Route53

  • Global Accelerator is for UDP, TCP, quick failover
  • Route53 has failover feature as well
  • If using custom DNS service, Global Accelerator is more fit

DAX vs ElasticCache Redis

  • High availability
  • In-memory
  • low latency
  • Caching
  • Power on demand, live leaderboard

Kinesis Data Stream vs SQS Queue

  • BOTH can handle the messages in the order.

AMI and Snapshot

  • AMI is based on underlying Snapshot
  • When copying the AMI from region A -> B, another snapshot will be cloned to region B

Communication application

  • Kinesis Data Stream: for real time, record ordering
  • KDS is better than SQS for ingestion data

Instance Store vs EBS/EFS

  • For data is replicated across instances, Instance Store is best fit
  • For HPC, Instance Store is better

Peak performance at CPU xx%

  • If scaling based on CPU ultilization around xx%, it’s target tracking
  • If choosing metric + threshold, it’s simple and step tracking

API Gateway Stateful and Stateless

  • Stateless HTTP-based, Restful APIs
  • Stateful Websocket APIs

CloudFront n On-Premise server

  • Can use CF with custom origin poiting to On-Premise server for optimizing performance

S3 & Dynamic Website

  • Cannot host dynamic website on S3

Graph View