Struct Config 

pub struct Config {
    pub buffer_size: u64,
    pub rotate_threshold: f64,
    pub fold_threads: Option<usize>,
}

Runtime configuration for a DonaDbX instance.

All fields have sensible defaults via Config::default(); most deployments only need to override buffer_size to match available RAM.

Example

use donadb_x::Config;

let cfg = Config {
    buffer_size:      512 << 20, // 512 MiB segments
    rotate_threshold: 0.75,
    fold_threads:     Some(4),
};

Fields

buffer_size: u64

Maximum size of a single log segment in bytes.

The active log is memory-mapped at this size on creation. When the fill ratio reaches rotate_threshold, the segment is sealed and a fresh one is opened.

Default: 2 GiB (2 << 30).

rotate_threshold: f64

Fraction of buffer_size at which segment rotation is triggered, expressed as a value in (0.0, 1.0].

Rotation is checked after every commit(). Once write_offset / buffer_size >= rotate_threshold, the current segment is sealed atomically and a new active log is created.

Default: 0.80 (rotate at 80 % full).

fold_threads: Option<usize>

Number of threads used by the Rayon fold pool for post-commit hashing.

None lets the engine choose automatically (currently half of the logical CPU count). Set an explicit value to bound CPU usage on shared hosts.

Default: None (auto-detect).

Trait Implementations

impl Clone for Config

fn clone(&self) -> Config

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.

impl Default for Config

fn default() -> Self

Returns a configuration suitable for most validator deployments: 2 GiB segments, 80 % rotation threshold, auto-detected fold threads.