Wiki Article · Cinematic

At-most-once delivery

At-most-once delivery ek message delivery guarantee (ya delivery semantic) hai jiska simple matlab…

Overview

At-most-once delivery — Quick Facts

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Field: Value

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Type: Delivery guarantee / messaging…

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Guarantee: 0 or 1 delivery (no duplicates)

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Main benefit: Duplicate processing ka risk kam

Topic 1

Overview

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packets drop ho sakte hain

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delays ho sakte hain

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duplicates generate ho sakte hain…

Topic 2

Simple definition (beginner)

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At-most-once: aap ek baar note…

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receiver ko duplicate note milne…

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lekin receiver ko note milna…

Topic 3

How it works (conceptual)

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Producer/Sender: message banata…

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Network/Transport: message carry…

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Consumer/Receiver: message receive…

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No retry (ya retry ko is tarah…

Topic 4

Key properties

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less bookkeeping

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less storage for delivery state

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less coordination

Topic 5

Where you see it in real systems

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Telemetry / metrics: ek metric…

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Non-critical logs: occasional log…

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Best-effort notifications: “FYI”…

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Low-latency fire-and-forget work…

Topic 6

At-most-once vs at-least-once vs exactly-once

✨ Neeche ek simple comparison table: | Semantic | Duplicate possible? | Loss possible? |…

Topic 7

When it is a good choice

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message loss acceptable ho

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duplicates expensive/dangerous hon…

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you prefer simplicity + low…

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you want very low latency and…

Topic 8

When it is a bad choice

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action critical ho (payments,…

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missing message se inconsistent…

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audit/compliance require karta ho…

Topic 9

Security & privacy notes

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audit gaps create ho sakte hain…

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incident investigation harder ho…

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delivery semantic alone security…

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integrity/authentication (signing,…

Topic 10

Performance considerations

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fewer retries

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less state tracking

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network quality

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message size

Topic 11

Common mistakes

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"At-most-once" ko "delivery…

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Critical workflows me best-effort…

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Loss ko handle karne ke liye…

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Idempotency/deduplication concepts…

Topic 12

Diagram

⭐ `mermaid flowchart TD A[Sender/Producer] -->|Send message once| B[Network] B…

Comparison

At-most-once vs at-least-once vs exactly-once

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---: ---:

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At-most-once: No (goal)

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At-least-once: Yes

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quiz — Question 1

At-most-once delivery ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

At-most-once delivery ka 'Type' kya hai?

Complete! 🎉

At-most-once delivery Complete!

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