Baidu Geek Talk

Aug 30, 2023 · Industry Insights

Midgard: Adaptive Storage Management for Search – From Simple Tables to Intelligent Layers

This article examines how Baidu's search service evolved its storage architecture—from a basic key‑value table to a hybrid HDD/Redis cache and finally to a sharded, multi‑collection design—culminating in Midgard, an intelligent storage‑layer manager that abstracts and optimizes data access for changing business needs.