Ravi Sir's Cards › AWS
Myth or practice?
This comparison card contrasts Myth or practice. Exactly-once claim is described as assume the stream is exactly once. At-least-once + idempotent is described as idempotent upsert with external version.
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What this card says
Myth or practice?
Exactly-once claim
Assume the stream is exactly once.
At-least-once + idempotent
Idempotent upsert with external version.
Key points
No retry design.
ALO + DLQ + IteratorAge.
Example
Poison mapping stalls a shard.
Use when
Myth.
Practice.