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JD Tech
JD Tech
Aug 28, 2023 · Backend Development

Handling Large Payload Issues in JD Logistics: Causes, Impacts, and Mitigation Strategies

The article analyzes the root causes and system‑wide consequences of oversized messages in JD Logistics, explains middleware limits of JMQ and JSF, and presents design principles, code‑level checks, and practical mitigation techniques such as pagination, claim‑check pattern, batch sizing, and monitoring to prevent service outages.

JMQJSFMessage Queue
0 likes · 32 min read
Handling Large Payload Issues in JD Logistics: Causes, Impacts, and Mitigation Strategies
JD Tech
JD Tech
Jan 15, 2019 · Backend Development

Performance, Storage, Index, and Cache Design of JD's JMQ4 Message Middleware

The article presents JD's self‑developed JMQ middleware, detailing its 2018 performance improvements, comparative benchmarks with Kafka, storage and index architecture evolution from JMQ2 to JMQ4, and the high‑performance I/O and caching strategies that enable millions of TPS on modern hardware.

CacheIndexingJMQ
0 likes · 12 min read
Performance, Storage, Index, and Cache Design of JD's JMQ4 Message Middleware
JD Retail Technology
JD Retail Technology
Jan 8, 2019 · Backend Development

Performance, Storage, Indexing, and Caching Design of JMQ4 Middleware

The article presents an in‑depth technical overview of JD's self‑developed JMQ middleware, detailing its performance improvements over previous versions, comparing write throughput with Kafka under synchronous and asynchronous scenarios, and explaining JMQ4's storage architecture, dense indexing, high‑performance I/O, and cache management strategies.

IndexingJMQMessage Queue
0 likes · 11 min read
Performance, Storage, Indexing, and Caching Design of JMQ4 Middleware
JD Tech
JD Tech
Apr 2, 2018 · Backend Development

Introduction to MQTT and JMQ’s MQTT Support Architecture

This article introduces the MQTT protocol, outlines its key characteristics, explains the challenges it poses for IoT messaging, and details how JMQ addresses these challenges through a layered proxy‑broker architecture, subscription management, quality‑of‑service handling, and real‑world JD deployment.

BrokerIoTJMQ
0 likes · 8 min read
Introduction to MQTT and JMQ’s MQTT Support Architecture