Struct IdAllocator 

pub struct IdAllocator { /* private fields */ }

Allocates globally unique VIDs and EIDs using auto-increment counters.

This allocator uses batch reservation to minimize object store writes:

• Reserves a batch of IDs (e.g., 1000) from the object store
• Allocates from the local batch until exhausted
• Reserves a new batch when needed

Implementations

impl IdAllocator

pub async fn new( store: Arc<dyn ObjectStore>, path: Path, batch_size: u64, ) -> Result<Self>

Creates a new ID allocator, loading existing state from object store.

pub async fn allocate_vid(&self) -> Result<Vid>

Allocates a new VID.

Returns a globally unique, auto-incrementing vertex ID.

pub async fn allocate_vids(&self, count: usize) -> Result<Vec<Vid>>

Allocates multiple VIDs at once.

pub async fn allocate_eid(&self) -> Result<Eid>

Allocates a new EID.

Returns a globally unique, auto-incrementing edge ID.

pub async fn allocate_eids(&self, count: usize) -> Result<Vec<Eid>>

Allocates multiple EIDs at once.

pub async fn current_vid(&self) -> u64

Returns the current VID counter value (next VID that would be allocated).

pub async fn current_eid(&self) -> u64

Returns the current EID counter value (next EID that would be allocated).