Cheat sheetAWS-01

Compute & Resilience

AWS SAA / Compute & Resilience

Design compute that self-heals across Availability Zones using Auto Scaling, load balancing, and multi-AZ placement.

ASG
Auto Scaling GroupMaintains desired healthy count across AZs; replaces failed instances.
ALB
App Load BalancerLayer 7 — routes by path/host/header for HTTP/HTTPS.
NLB
Network Load BalancerLayer 4 — TCP/UDP, ultra-low latency, static IPs.
MAZ
Multi-AZSpread capacity across AZs so one data center failure isn't total.
⚑

Front an ASG spanning 2+ AZs with an ALB using health checks for automatic recovery.

HA web tierALB + ASG (min 2, across 2 AZs) → survives an AZ outage automatically.
Gaming backendNLB for millions of low-latency TCP connections with a static IP allowlist.
ASG: min/desired/max across >=2 AZs
ALB target group health check path: /healthz
Fault tolerance = spare capacity already running
ec2auto-scalingelbmulti-azhigh-availability
review in 6d