Struct RecordHeader 

pub struct RecordHeader {
    pub magic: u32,
    pub format_version: u16,
    pub record_type: u16,
    pub lsn: u64,
    pub tenant_id: u32,
    pub vshard_id: u16,
    pub payload_len: u32,
    pub crc32c: u32,
}

WAL record header (fixed 30 bytes).

Fields

magic: u32

Magic number (WAL_MAGIC).

format_version: u16

Format version for forward/backward compatibility.

record_type: u16

Record type discriminant.

lsn: u64

Log Sequence Number — monotonically increasing, globally unique.

tenant_id: u32

Tenant ID for multi-tenant isolation.

vshard_id: u16

Virtual shard ID for routing.

payload_len: u32

Length of the payload following this header.

crc32c: u32

CRC32C of the header (excluding this field) + payload.

Implementations

impl RecordHeader

pub fn to_bytes(&self) -> [u8; 30]

Serialize the header to a byte buffer.

pub fn from_bytes(buf: &[u8; 30]) -> Self

Deserialize a header from a byte buffer.

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

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

pub fn logical_record_type(&self) -> u16

Get the logical record type (with encryption flag stripped).

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

Validate this header’s magic and version.

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 Debug for RecordHeader

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

Formats the value using the given formatter.

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 Copy for RecordHeader

impl Eq for RecordHeader

impl StructuralPartialEq for RecordHeader