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Vertical scaling.

also: scale up · scaling up · scale vertically

Making one machine bigger (more CPU, RAM, faster disks) to handle more load.

the two-minute refresher

Example: 4 cores and 16 GB RAM become 64 cores and 512 GB.
Simple: no code changes, no distributed-systems problems.
Hard ceiling and rising cost, and the machine is still a single point of failure.
Often the right first step: scale up until it hurts, then scale out.

Where the course teaches it

W00 · Part 6System Design Terminology & Theorylearn it →W10 · Day 4Capacity Planningrevisit →

Related concepts

Horizontal scaling