Message Deduplication

Top Architect

Oct 24, 2021 · Backend Development

Message Deduplication and Exactly‑Once Semantics in RocketMQ

This article explains why RocketMQ guarantees at‑least‑once delivery, describes the three typical duplicate‑message scenarios, compares transaction‑based and non‑transactional deduplication approaches (including a Redis‑based solution), provides sample SQL and Java code, and discusses the limitations and best‑practice recommendations for achieving idempotent message consumption.

IdempotencyJavaMessage Deduplication

0 likes · 20 min read

Message Deduplication and Exactly‑Once Semantics in RocketMQ

Architecture Digest

Sep 17, 2021 · Backend Development

Message Deduplication and Exactly-Once Semantics in RocketMQ

This article explains why message middleware guarantees at‑least‑once delivery, describes three common duplication scenarios in RocketMQ, and presents both transactional and non‑transactional deduplication solutions—including SQL examples and a Redis‑based idempotence library—to achieve exactly‑once processing.

BackendMessage Deduplicationdistributed systems

0 likes · 19 min read

JD Retail Technology

Oct 25, 2019 · Backend Development

Design and Optimization Strategies for High‑Concurrency Instant Messaging Processing

This article explains how to handle high‑concurrency instant‑messaging scenarios by designing message deduplication, optimizing SQLite write performance with batch inserts and WAL mode, improving query speed with indexes and caching, and reducing UI refresh overhead through delayed and scroll‑aware updates.

Instant MessagingMessage DeduplicationSQLite

0 likes · 19 min read

Design and Optimization Strategies for High‑Concurrency Instant Messaging Processing