Struct FencedWalEntry 

pub struct FencedWalEntry {
    pub lsn: u64,
    pub prev_crc: u32,
    pub epoch: u64,
    pub payload: Vec<u8>,
    pub crc: u32,
}

WAL entry with epoch fencing and CRC chain

Each entry contains:

• Its own LSN (sequence number)
• The CRC of the previous entry (chain verification)
• The current epoch (detects interleaved writes)
• The payload data
• Its own CRC

Fields

lsn: u64

Log Sequence Number (position in WAL)

prev_crc: u32

CRC of the previous entry (0 for first entry)

epoch: u64

Epoch when this entry was written

payload: Vec<u8>

Payload data

crc: u32

CRC of this entry

Implementations

impl FencedWalEntry

pub fn new(lsn: u64, prev_crc: u32, epoch: u64, payload: Vec<u8>) -> Self

Create a new fenced entry

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

Serialize entry to bytes

pub fn read_from<R: Read>(reader: &mut R) -> Result<Self>

Read entry from reader

pub fn size(&self) -> usize

Get the size of this entry in bytes

Trait Implementations

impl Clone for FencedWalEntry

fn clone(&self) -> FencedWalEntry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FencedWalEntry

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

Formats the value using the given formatter.