Struct InstallSnapshotChunk 

pub struct InstallSnapshotChunk {
    pub term: u64,
    pub leader_id: u64,
    pub last_included_index: u64,
    pub last_included_term: u64,
    pub data: Vec<u8>,
    pub shard_id: u64,
    pub payload_format: u32,
    pub eof: bool,
}

One chunk of a streamed InstallSnapshot transfer. Raft metadata rides on every chunk (cheap, and makes each chunk self-describing); the receiver takes the header fields from the FIRST chunk. Streaming exists because a transfer snapshot is shard-sized (1.39GB observed): as ONE unary message it needs a giant gRPC message cap and a 2x encode/decode memory spike on both ends, and tonic’s bare 4MiB server default silently blocked follower healing for days.

payload_format 0 (legacy): data is a raw byte slice of ONE monolithic msgpack payload; the receiver concatenates slices in stream order and decodes the whole thing at once (peak memory = full payload). payload_format 1 (framed): each data is ONE self-contained msgpack SnapFrame (Header / CfBegin / Entries / CfEnd / End); the receiver spools frames to disk as they arrive and the restore applies them one at a time, so neither side ever materializes the full payload in memory. A framed stream is terminated by an explicit eof=true marker chunk — a stream that ends without one was aborted by the sender (e.g. export failure) and must be discarded, because gRPC also ends the stream cleanly in that case.

Fields

term: u64

leader_id: u64

last_included_index: u64

last_included_term: u64

data: Vec<u8>

payload slice (format 0) or one frame (format 1)

shard_id: u64

payload_format: u32

0 = legacy monolithic slices, 1 = framed

eof: bool

framed streams: terminal marker chunk (empty data)

Trait Implementations

impl Clone for InstallSnapshotChunk

fn clone(&self) -> InstallSnapshotChunk

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for InstallSnapshotChunk

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

Formats the value using the given formatter.

impl Default for InstallSnapshotChunk

fn default() -> Self

Returns the “default value” for a type.

impl Message for InstallSnapshotChunk

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for InstallSnapshotChunk

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for InstallSnapshotChunk