Expand description
Segment header — 32-byte fixed prefix at file offset 0.
Layout (little-endian):
┌────────┬─────────┬───────┬─────────────┬──────────┐
│ magic │ version │ flags │ schema_hash │ crc32c │
│ 8 byte │ 2 byte │ 2 byte│ 8 byte │ 4 byte │
└────────┴─────────┴───────┴─────────────┴──────────┘Total: 20 bytes covered by CRC + 4 byte CRC = 24 bytes.
schema_hash is a fingerprint of the crate::schema::ArraySchema
the segment was written against; readers reject segments whose hash
doesn’t match the live schema (no implicit migrations).
Structs§
- Segment
Header - Fixed-size segment header.
Constants§
- FORMAT_
VERSION - On-disk format version. Bump on layout-incompatible changes.
- HEADER_
MAGIC b"NDAS\0\0\0\1"— NodeDB Array Segment, version slot in last byte.- HEADER_
SIZE