Struct FsSeedStore 

pub struct FsSeedStore { /* private fields */ }

The reference seed substrate: one file per node under root/seed.

Layout: root/seed/<aa>/<bb>/<64-hex> where aa/bb are the first two bytes of the id in hex. Writes are atomic (tmp -> rename); reads are hash-verified by SeedStore::get_node and strict-range by SeedStore::get_node_range.

Implementations

impl FsSeedStore

pub fn open(root: impl AsRef<Path>) -> Result<Self>

Open (creating if needed) a seed store rooted at root, with a fresh, private I/O counter set.

pub fn open_with_io(root: impl AsRef<Path>, io: IoCounters) -> Result<Self>

Open a seed store that accounts every read against io. A caller that also holds a crate::field::FieldStore shares its counter handle here, so a seed read made through either handle is attributed to one universe.

pub fn root(&self) -> &Path

The seed-store root directory.

Trait Implementations

impl Debug for FsSeedStore

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

Formats the value using the given formatter.

impl SeedStore for FsSeedStore

fn put_node(&mut self, canonical: &[u8]) -> Result<NodeId>

Store the canonical bytes of one node, returning its content id.

fn get_node(&self, id: &NodeId) -> Result<Vec<u8>>

Fetch the exact canonical bytes for id.

fn get_node_range(&self, id: &NodeId, offset: u64, len: u64) -> Result<Vec<u8>>

Fetch len bytes of id starting at offset (strict; no EOF clip).

fn contains_node(&self, id: &NodeId) -> Result<bool>

Whether id is present.

fn list_nodes(&self) -> Result<Vec<(NodeId, u64)>>

Every stored (id, canonical_len), for closure checking and GC.