Horizontal Scaling

A horizontally scalable system is one that can increase capacity by adding more computers to the system.

flowchart LR

subgraph Before
A[(Computer 1)]
end

subgraph After
B[(Computer 1)]
C[(Computer 2)]
D[(Computer 3)]
end

Before --> After

Horizontal Scaling Advantages

• Allows for parallel execution of workloads
• Increased fault tolerance
• Cheaper compared to vertical scaling

Horizontal Scaling Disadvantages

• Decreased consistency
• Joining data between nodes is more time consuming