Struct RecordHeader 

pub struct RecordHeader {
    pub magic: u32,
    pub format_version: u16,
    pub record_type: u32,
    pub lsn: u64,
    pub tenant_id: u64,
    pub vshard_id: u32,
    pub payload_len: u32,
    pub database_id: u64,
    pub reserved: [u8; 8],
    pub crc32c: u32,
}

WAL record header (fixed 54 bytes).

Fields

magic: u32

format_version: u16

record_type: u32

lsn: u64

tenant_id: u64

vshard_id: u32

payload_len: u32

database_id: u64

Database scope for this record. Stored as a raw u64; callers convert to/from DatabaseId. Pre-Tier-2 records had zeros here, so 0 maps to DatabaseId(0) (the default database) — fully backward compatible.

Occupies bytes 34–41 of the on-disk header (previously part of reserved).

reserved: [u8; 8]

Reserved for future use; must be zero on write; ignored on read (but covered by CRC32C). Occupies bytes 42–49.

crc32c: u32

Implementations

impl RecordHeader

pub fn to_bytes(&self) -> [u8; 54]

pub fn from_bytes(buf: &[u8; 54]) -> Self

pub fn compute_checksum(&self, payload: &[u8]) -> u32

CRC32C over header (excluding the crc32c field) + payload.

The 16 reserved bytes are included in the CRC so they cannot be silently modified without detection.

pub fn logical_record_type(&self) -> u32

Logical record type with the encryption flag stripped.

pub fn validate(&self, offset: u64) -> Result<()>

Trait Implementations

impl Clone for RecordHeader

fn clone(&self) -> RecordHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RecordHeader

impl Debug for RecordHeader

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

Formats the value using the given formatter.

impl Eq for RecordHeader

impl PartialEq for RecordHeader

fn eq(&self, other: &RecordHeader) -> 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 StructuralPartialEq for RecordHeader