Redis from the ground up
What Redis is, why keeping data in memory makes it so fast, the data structures it offers, how it survives a restart, and the jobs it is actually good at.
CodexBash, , 6 min read
Redis is a database that keeps everything in memory. That one decision makes it fast enough to answer in well under a millisecond, which is why it sits behind the login sessions, leaderboards, rate limits and caches of a huge share of the web. It is also simple enough to learn in an afternoon. This article covers what it is, how it works, and when to reach for it.
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