Official JD Tech public account delivering best practices and technology innovation.
This article explains Apache Hudi’s core concepts, including its timeline architecture, file layout, indexing mechanisms, and the two primary table types—Copy on Write and Merge on Read—along with their trade‑offs and the various query modes such as snapshot, time‑travel, and incremental queries.
This article provides an in‑depth technical analysis of DongSQL’s kernel redesign—including RETURNING clause, Inventory Hint, CCL concurrency control, Statement Outline, and thread‑pool optimizations—showing how each feature dramatically improves throughput and latency for high‑traffic e‑commerce workloads.
JoyAgent, JD's open‑source intelligent‑agent platform, now adds multimodal Retrieval‑Augmented Generation (RAG) capabilities, combining graph‑based knowledge, hierarchical chunking, and vision‑language models to handle text, images, tables, and API data for enterprise knowledge processing and evaluation.
This article explains why effective chunking is crucial for RAG performance, compares seven major chunking strategies—including fixed‑size, semantic, recursive, document‑structure, agent‑driven, sentence, and paragraph methods—and offers practical guidance on selecting and optimizing chunks for real‑world AI applications.
This article explains experimental heterogeneity (HTE), clarifies key concepts such as CATE and ITE, discusses why analyzing treatment‑effect variation matters for business, compares statistical and machine‑learning methods, and introduces an open‑source Python tool that automates CATE discovery and reporting.
The article explains how Easy Code Reader MCP Server integrates with Joycode and large language models to automatically retrieve and analyze Java source code across multiple projects or JAR files, improving code‑agent accuracy and developer productivity.
This article outlines the motivation, design, architecture, engineering implementation, large‑model selection, and future improvement plans for an AI‑driven experiment analysis agent that integrates data aggregation, modular workflow orchestration, and interactive frontend features to streamline AB‑test insights.
The article explains how JD.com's AI virtual try‑on system Oxygen Tryon uses advanced computer‑vision and generative models to let shoppers instantly preview clothing on their own photos, dramatically improving purchase decisions, reducing return rates, and outlining technical challenges, innovations, and future development plans.
JoyCode Agent reaches a 74.6% pass rate on the authoritative SWE‑bench Verified benchmark, ranking in the global top‑3, and is now open‑source, showcasing a high‑efficiency, test‑driven, iterative approach to automated code repair that dramatically reduces token consumption while improving success rates.
This article examines a real-world incident where a massive cache key and cache penetration during a high‑traffic promotion caused Redis overload and a system outage, then details root‑cause analysis, mitigation steps like serialization changes, compression, lock‑based fallback, and preventive best practices.
