Struct Config 

#[non_exhaustive]
pub struct Config {
    pub dir: PathBuf,
    pub sync: SyncPolicy,
    pub max_segment_bytes: u64,
    pub max_bytes: Option<u64>,
    pub low_watermark: f64,
    pub compact_ratio: f64,
    pub compact_min_bytes: u64,
    pub background: bool,
    pub snapshot_max_bytes: usize,
    pub snapshot_zstd_level: i32,
    /* private fields */
}

打开存储的配置，用 Config::new 创建后按需修改字段。

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

dir: PathBuf

sync: SyncPolicy

max_segment_bytes: u64

单个段文件的大小上限，超过就换新段。不能超过 2GiB。

max_bytes: Option<u64>

存储空间上限（F-8.4）。超过后按 LRU 淘汰缓存和快照内容，任务状态不会被淘汰。

low_watermark: f64

淘汰到上限的这个比例为止。

compact_ratio: f64

无效数据（被覆盖、删除）占比达到这个值时后台压缩。

compact_min_bytes: u64

总大小低于这个值时不自动压缩。

background: bool

是否在后台线程自动压缩和淘汰；关掉后需要自己调用 Store::gc、Store::compact。

snapshot_max_bytes: usize

单个快照（压缩前）的大小上限。

snapshot_zstd_level: i32

Implementations

impl Config

pub fn new(dir: impl Into<PathBuf>) -> Self

Trait Implementations

impl Clone for Config

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Config

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

Formats the value using the given formatter.