System Design Patterns: From Fundamentals to Real Systems
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Vertical Scaling

1. The Pattern

Make the machine bigger: more CPU cores, more memory, faster disks. The architecture does not change; the machine does.

Vertical scaling is the least fashionable pattern in this course, but it deserves serious consideration because teams often proceed immediately to server fleets and microservices when one larger machine would meet the requirement for years.

A larger machine provides one advantage unavailable from every other pattern in this module: it adds no new failure modes

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