Scaling Vertical vs Horizontal

• Vertical Scaling(Scaling Up) - Buying a bigger machine
• Horizontal Scaling (Scaling Out) - Adding more machines

HORIZONTAL	VERTICAL
Load balancing Required	NA
Resilient	Single point of failure
RPC (Slow Network Calls)	IPC - fast calls
Data inconsistency	Consistent
Scales well as users increases	Hardware limit

• Horizontal Scaling of DB is known as Sharding

Exposing the code/algorithm sitting on server via an API through a protocol

Sending the response back to the user