Oct 31, 2026 · Fundamentals

Why Linux Daemons End with 'd': From Maxwell's Demon to systemd

This article traces the 'd' suffix in Linux daemon names like sshd and systemd to its 1963 MIT origin, where Fernando Corbató's team borrowed 'daemon' from Maxwell's Demon in physics, explaining the Greek spelling, Unix adoption, the fork() pun, and the later backronym 'Disk And Execution MONitor'.

Fernando CorbatóLinuxMaxwell's Demon

0 likes · 8 min read

Why Linux Daemons End with 'd': From Maxwell's Demon to systemd

DeWu Technology

Apr 14, 2023 · Backend Development

Async-fork: Mitigating Query Latency Spikes Incurred by the Fork-based Snapshot Mechanism from the OS Level

Async‑fork shifts the costly page‑table copying from Redis’s parent process to its child, allowing the parent to resume handling queries instantly and cutting snapshot‑induced latency spikes by over 98%, thereby dramatically improving tail latency during AOF rewrites, RDB backups, and master‑slave synchronizations.

Async-forkBackend DevelopmentLatency Optimization

0 likes · 21 min read

Async-fork: Mitigating Query Latency Spikes Incurred by the Fork-based Snapshot Mechanism from the OS Level

fork system call

Why Linux Daemons End with 'd': From Maxwell's Demon to systemd

Async-fork: Mitigating Query Latency Spikes Incurred by the Fork-based Snapshot Mechanism from the OS Level