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Deepin Linux
Deepin Linux
Dec 21, 2024 · Fundamentals

Understanding Linux Kernel Bitmap Data Structure and Its APIs

This article explains the Linux kernel bitmap data structure, its definition, macro-based declarations, related assembly instructions, core bitmap APIs such as set_bit and test_bit, various bit‑operation functions, and practical applications ranging from PID allocation to device management and file‑system indexing.

Bit OperationsBitMapData Structure
0 likes · 27 min read
Understanding Linux Kernel Bitmap Data Structure and Its APIs
Wukong Talks Architecture
Wukong Talks Architecture
Nov 9, 2021 · Databases

Binary State Statistics with Redis Bitmap: Efficient User Login and Sign‑In Tracking

This article explains how to use Redis Bitmap to efficiently store and query massive binary‑state data such as user login status and daily sign‑in records, covering underlying memory structures, command usage, and practical examples for counting, checking, and aggregating large‑scale user activity.

Bit OperationsBitMapRedis
0 likes · 11 min read
Binary State Statistics with Redis Bitmap: Efficient User Login and Sign‑In Tracking
Java Architect Essentials
Java Architect Essentials
May 26, 2021 · Databases

Binary State Statistics with Redis Bitmap: Efficient User Login and Sign‑In Tracking

This article explains how to use Redis Bitmap for binary state statistics such as user login status and daily sign‑in tracking, demonstrating memory‑efficient storage, relevant commands, and techniques for counting continuous sign‑ins across massive user bases.

Bit OperationsBitMapData Structures
0 likes · 9 min read
Binary State Statistics with Redis Bitmap: Efficient User Login and Sign‑In Tracking