Tag
segment-summaries
- 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Liveness Accounting: How the Cleaner Knows What Is Already Dead Maintaining a live-byte count per segment as blocks are superseded, why the count must be exact rather than sampled, and how indirect blocks make the decrement easy to get wrong.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
- Nov 23, 2023 Checkpoint Regions and Tail Recovery in an Append-Only Log How a log-structured filesystem bounds what a crash can lose, and how it reconstructs the segment summaries written after the last durable checkpoint by scanning forward instead of backward. filesystems