Cache Invalidation Is Not the Hard Part
Deleting a key is one line. The hard parts are the copies you forgot, the read-write race that leaves stale data with clean logs, and the stampede at expiry.
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Deleting a key is one line. The hard parts are the copies you forgot, the read-write race that leaves stale data with clean logs, and the stampede at expiry.
5 min read
Engineers argue consistency via CAP. The answerable question is what a user will forgive seeing, and how to get that from a stakeholder instead of guessing.
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