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Hot key
One record that draws more traffic than one machine can serve.
Taught in Chapter 30: Hot Keys.
More from the same chapter
- Fan-out on read: Building a feed when it's opened, from the latest posts of everyone followed.
- Fan-out on write: Copying each new post into every follower's feed when it's published.
- Sub-counters: One counter split across several keys, summed on read, so writes spread out.