# Refer to previous readings about System Design Components, at different stages solve the problem(s) by introducing different components  into system.

# DNS with single server setup
# Load balancer(s)
# Database replication
# Cache
# CDN
# Stateless web tier (introduce shared storage to store shared states)
# Multiple Datacenters
# GeoDNS
# Message Queue: use MQ tto achieve loose coupling
# Database scaling


Summary:

• keep web tier stateless
• Build redundancy at every tier
• Cache data as much as you can
• Support multiple data centers
• Host static assets on CDN
• Scale your data tier by sharding (or functional partitioning)
• Split tiers into individual services, like using messaging queue
• Monitor your system and use automation tools for your system