Enum Distribution 

pub enum Distribution {
    Vnode,
    Ketama,
    Modula,
    Random,
    RandomSlicing,
}

Distribution algorithm selected by the pool’s distribution: directive.

Vnode is the historical default and the only mode the C reference engine supported in the Rust port until RandomSlicing was added. Ketama, Modula, and Random are accepted for backward compatibility with the C configuration vocabulary; they collapse to Vnode at runtime and emit a deprecation warning at config-load time.

Examples

use dynomite::conf::Distribution;
assert_eq!(Distribution::parse("vnode").unwrap(), Distribution::Vnode);
assert_eq!(
    Distribution::parse("random_slicing").unwrap(),
    Distribution::RandomSlicing
);

Variants

Vnode

Per-rack continuum keyed by per-peer token lists. The historical default.

Ketama

Compatibility alias accepted by the C reference; collapsed to Self::Vnode at runtime with a deprecation warning.

Modula

Compatibility alias accepted by the C reference; collapsed to Self::Vnode at runtime with a deprecation warning.

Random

Compatibility alias accepted by the C reference; collapsed to Self::Vnode at runtime with a deprecation warning.

RandomSlicing

Random-slicing distribution: a small, gap-free (name, size) partition table over the 64-bit hash space. See crate::hashkit::random_slicing.

Implementations

impl Distribution

pub fn parse(s: &str) -> Result<Self, ConfError>

Parse a distribution: value (case-insensitive).

Errors

Returns ConfError::BadDistribution when the value is not a recognised mode.

Examples

use dynomite::conf::Distribution;
assert_eq!(Distribution::parse("VNODE").unwrap(), Distribution::Vnode);
assert!(Distribution::parse("sphere").is_err());

pub const fn as_str(self) -> &'static str

Render back to the canonical YAML name.

Examples

use dynomite::conf::Distribution;
assert_eq!(Distribution::Vnode.as_str(), "vnode");
assert_eq!(Distribution::RandomSlicing.as_str(), "random_slicing");

pub const fn is_supported(self) -> bool

True for the modes that survived the C-to-Rust port untouched; Ketama, Modula, and Random are accepted for backward compatibility but collapse to Vnode at runtime.

Examples

use dynomite::conf::Distribution;
assert!(Distribution::Vnode.is_supported());
assert!(Distribution::RandomSlicing.is_supported());
assert!(!Distribution::Ketama.is_supported());

Trait Implementations

impl Clone for Distribution

fn clone(&self) -> Distribution

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Distribution

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

Formats the value using the given formatter.

impl Default for Distribution

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Distribution

fn deserialize<D: Deserializer<'de>>(de: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl Display for Distribution

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

Formats the value using the given formatter.

impl Hash for Distribution

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Distribution

fn eq(&self, other: &Distribution) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Distribution

fn serialize<S: Serializer>(&self, ser: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl Copy for Distribution

impl Eq for Distribution

impl StructuralPartialEq for Distribution