Ravi Sir's Cards › AWS
Couple or buffer?
This comparison card contrasts Couple or buffer. SNS, then Lambda direct is described as each SNS delivery invokes Lambda immediately. SNS, then SQS, then Lambda is described as sQS buffers, batches, isolates retries/DLQ.
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What this card says
Couple or buffer?
SNS→Lambda direct
Each SNS delivery invokes Lambda immediately.
SNS→SQS→Lambda
SQS buffers, batches, isolates retries/DLQ.
Key points
Tiny fan-out demos.
Prod multi-consumer.
Example
Subscribe Lambda to SNS.
Use when
Fragile.
Preferred.