Copy‑on‑write B‑trees enable high‑concurrency database operations by allowing readers to see a stable snapshot while writers modify a new version of the tree. The article explains the underlying mechanics, performance benefits, and practical implementation tips.
A deep dive into Linux’s copy‑on‑write semantics, explaining its inner workings, benefits, and the trade‑offs developers must consider.
Copy‑on‑write (CoW) lets the kernel share pages between processes until a write occurs, cutting memory use and speeding up forks.
Write-ahead logging (WAL) ensures that databases can survive sudden power loss by recording changes before they reach the data files, enabling rapid, loss‑free recovery.
The article explains the fundamental design of LSM trees, contrasts them with B‑trees for write‑intensive scenarios, and outlines when each structure shines.