Partitioning: Horizontal vs Vertical Splits

Now that you understand the concept, how do you actually split your data? There are two main strategies:

Horizontal Partitioning (Row-Based Splitting): Imagine a users table with 1 million rows:

• Partition 1: Users with IDs 1-500,000
• Partition 2: Users with IDs 500,001-1,000,000

You're slicing the table horizontally, keeping all columns but splitting the rows.

Vertical Partitioning (Table-Based Splitting): Imagine you have multiple tables:

• Database 1: Users, Profiles, Settings tables
• Database 2: Orders, Payments, Shipping tables

You're slicing vertically, putting different tables in different databases.

Real-World Example: Horizontal: "All West Coast users go to Database A, East Coast users go to Database B" Vertical: "All authentication stuff goes to Database A, all order stuff goes to Database B"

The Microservices Connection: Vertical partitioning is actually the database equivalent of splitting a monolith into microservices!

Pro Tip: Horizontal partitioning splits the same type of data, vertical partitioning splits different types of functionality.