I used to nod along whenever Redis came up in standups. Turns out it's simple: a database that lives in RAM instead of on disk. RAM reads in nanoseconds, disk reads in milliseconds. That's the whole trick. Swipe for what it actually does: caching, sessions, rate limiting, queues, the 5 data types (strings, hashes, lists, sets, sorted sets), and when to skip it. Comment "REDIS" for the cheat sheet 👇 Follow for more dev concepts explained simply.
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