Struct DbFecGroupMeta 

pub struct DbFecGroupMeta {
    pub magic: [u8; 8],
    pub version: u32,
    pub page_size: u32,
    pub start_pgno: u32,
    pub group_size: u32,
    pub r_repair: u32,
    pub object_id: [u8; 16],
    pub source_page_xxh3_128: Vec<[u8; 16]>,
    pub db_gen_digest: [u8; 16],
    pub checksum: u64,
}

Per-group metadata stored in the .db-fec sidecar.

Fields

magic: [u8; 8]

version: u32

page_size: u32

start_pgno: u32

group_size: u32

r_repair: u32

object_id: [u8; 16]

Content-addressed: Trunc128(BLAKE3(domain || canonical)).

source_page_xxh3_128: Vec<[u8; 16]>

Per-source-page xxh3_128 hashes; length == group_size.

db_gen_digest: [u8; 16]

Must match DbFecHeader.db_gen_digest.

checksum: u64

Implementations

impl DbFecGroupMeta

pub fn new( page_size: u32, start_pgno: u32, group_size: u32, r_repair: u32, source_page_xxh3_128: Vec<[u8; 16]>, db_gen_digest: [u8; 16], ) -> Self

Create a new group meta. Computes object_id and checksum automatically.

pub fn serialized_size(&self) -> usize

Total serialized size.

pub fn serialized_size_for(group_size: u32) -> usize

Serialized size for a group with the given group_size.

pub fn to_bytes(&self) -> Vec<u8>

Serialize to bytes.

pub fn from_bytes(buf: &[u8]) -> Result<Self>

Deserialize from bytes.

Trait Implementations

impl Clone for DbFecGroupMeta

fn clone(&self) -> DbFecGroupMeta

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DbFecGroupMeta

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for DbFecGroupMeta

fn eq(&self, other: &DbFecGroupMeta) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for DbFecGroupMeta

impl StructuralPartialEq for DbFecGroupMeta