Struct HnswPersistence 

pub struct HnswPersistence;

Provides serialization and file persistence for HNSW index snapshots.

Implementations

impl HnswPersistence

pub fn new() -> Self

Create a new persistence instance.

pub fn serialize(&self, meta: &HnswMeta, layers: &[HnswLayer]) -> Vec<u8>

Serialize meta + layers into a byte vector.

The format is described in the module documentation.

pub fn deserialize( &self, bytes: &[u8], ) -> Result<(HnswMeta, Vec<HnswLayer>), PersistError>

Deserialize bytes into (HnswMeta, Vec<HnswLayer>).

pub fn save_to_file( &self, path: &Path, meta: &HnswMeta, layers: &[HnswLayer], ) -> Result<(), PersistError>

Write a snapshot to a file atomically (write → temp, rename).

pub fn load_from_file( &self, path: &Path, ) -> Result<(HnswMeta, Vec<HnswLayer>), PersistError>

Read a snapshot from a file.

pub fn validate_checksum(&self, bytes: &[u8]) -> bool

Validate the CRC32 checksum of serialized bytes.

Returns true if the checksum field matches the computed checksum of the payload, false otherwise.

pub fn merge_snapshots( &self, base: &HnswSnapshot, delta: &HnswSnapshot, ) -> HnswSnapshot

Merge a base snapshot with a delta snapshot.

Merge strategy:

• meta is taken from delta (delta always has the newer configuration)
• For each layer in delta, its nodes override/supplement the base layer nodes (keyed by node.id)
• Layers present only in base are preserved; layers only in delta are added

Trait Implementations

impl Clone for HnswPersistence

fn clone(&self) -> HnswPersistence

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HnswPersistence

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

Formats the value using the given formatter.

impl Default for HnswPersistence

fn default() -> HnswPersistence

Returns the “default value” for a type.