Struct WalHeader 

pub struct WalHeader {
    pub group: u32,
    pub segment: u64,
    pub salt: u64,
    pub base_seq: u64,
    pub base_prev: u64,
    pub created_ms: u64,
}

The header block of one life of a segment file.

Fields

group: u32

segment: u64

salt: u64

New for every life of the file; seeds every batch checksum in it.

base_seq: u64

Sequence of the first batch in this segment.

base_prev: u64

Checksum of the batch before base_seq (the chain continues across segments), or 0 for the first batch of the group.

created_ms: u64

Implementations

impl WalHeader

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

pub fn decode(bytes: &[u8]) -> Result<Option<Self>, WalError>

Ok(None) for an all-zero (never activated) header.

Trait Implementations

impl Clone for WalHeader

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WalHeader

impl Debug for WalHeader

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

Formats the value using the given formatter.

impl Eq for WalHeader

impl PartialEq for WalHeader

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for WalHeader