Struct LevelRoute 

pub struct LevelRoute {
    pub levels: Range<u8>,
    pub path: PathBuf,
    pub fs: Arc<dyn Fs>,
}

Per-level filesystem routing entry for tiered storage.

Maps a range of LSM levels to a base directory and filesystem backend. Tables at these levels are stored under path/tables/.

Example

use lsm_tree::config::LevelRoute;
use lsm_tree::fs::StdFs;
use std::sync::Arc;

// Hot tier: L0-L1 on NVMe
let hot = LevelRoute {
    levels: 0..2,
    path: "/mnt/nvme/db".into(),
    fs: Arc::new(StdFs),
};

// Cold tier: L4-L6 on HDD
let cold = LevelRoute {
    levels: 4..7,
    path: "/mnt/hdd/db".into(),
    fs: Arc::new(StdFs),
};

Fields

levels: Range<u8>

LSM levels this route covers (e.g., 0..2 for L0–L1).

path: PathBuf

Base data directory for tables at these levels.

fs: Arc<dyn Fs>

Filesystem backend for I/O at these levels.

Trait Implementations

impl Clone for LevelRoute

fn clone(&self) -> LevelRoute

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LevelRoute

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

Formats the value using the given formatter.