Tag
space-accounting
- Jun 8, 2026 Segment Liveness Accounting: How the Cleaner Knows What Is Already Dead Maintaining a live-byte count per segment as blocks are superseded, why the count must be exact rather than sampled, and how indirect blocks make the decrement easy to get wrong. filesystems
- Oct 14, 2023 Snapshot Reference Counts and Why Deleting One Costs So Much How a snapshot is a copied root plus shared blocks, how per-extent reference counts make sharing safe, and why removal requires walking what it owned. filesystems