Read the bottleneck
Use the evidence in front of you to find what is actually limiting the system.
03SCALE SOFTWARE SYSTEMS
YOU’LL LEAVE WITHScale a URL shortener from its first users to global traffic.
WHAT YOU’LL LEARN
Find the next bottleneck—and fix only that.
For people deciding how a product should change as traffic and complexity grow.
Choose the next move
Compare caching, queues, replication, and service boundaries without reaching for all of them.
Defend the tradeoff
Explain what your change improves, what it costs, and when it stops being enough.
Build it yourself.
Scale a URL shortener from its first users to global traffic.