Struct Snapshot 

pub struct Snapshot {
    pub snapshot_id: u64,
    /* private fields */
}

A point-in-time read-only view over a set of segments.

The snapshot holds a reference to the SnapshotRegistry and automatically releases its pins when dropped.

Holds cloned SegmentReader instances with cached indexes, so reads reuse the Engine’s already-opened segment metadata without re-parsing files.

Fields

snapshot_id: u64

Unique ID assigned by SnapshotRegistry::register.

Implementations

impl Snapshot

pub fn new( snapshot_id: u64, registry: SnapshotRegistry, readers: Vec<SegmentReader>, ) -> Self

Create a new Snapshot. Called by Engine::snapshot().

pub fn get( &self, ns: &[u8], key: &[u8], ) -> Result<Option<Vec<u8>>, EdgestoreError>

Look up a single key in the snapshot.

Reads from all pinned segments and returns the value from the entry with the highest LSN. Returns Ok(None) if not found or if the latest entry is a Delete.

pub fn range( &self, ns: &[u8], start: &[u8], end: &[u8], ) -> Result<Vec<(Vec<u8>, Vec<u8>)>, EdgestoreError>

Iterate over key-value pairs in [start, end) within a namespace.

Reads from all pinned segments, merges using LWW (last write wins by LSN), and returns a sorted vec of (raw_key, value) pairs with deletes filtered out.

Trait Implementations

impl Drop for Snapshot

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.