Enum LoadBalancer 

pub enum LoadBalancer {
    RoundRobin,
    LeastRequests,
    Random,
    IpHash,
    Maglev,
    PeakEwma,
}

Variants

RoundRobin

LeastRequests

Random

IpHash

Maglev

Maglev consistent hashing (DP-07, #236): Google’s Maglev algorithm uses a fixed-size lookup table (default 65537 entries) populated by each endpoint’s permutation. Provides better distribution than ketama for large endpoint pools with tight balance bounds. The hash key is determined by hash_on (client IP, cookie, or header).

PeakEwma

Peak-EWMA latency-aware load balancing (DW-090, Finagle-style): favors low-latency endpoints and degrades outliers. Each endpoint carries an atomic EWMA cost tracker (nanosecond resolution) updated with the Finagle peak-EWMA formula: a new RTT that EXCEEDS the current cost replaces it outright (the “peak”), otherwise the cost decays toward the new RTT at rate exp(-td / tau). Selection picks the endpoint with the lowest cost_ns * (inflight + 1) score, so a slow endpoint with few in-flight requests can still win a pick while a fast one is saturated. Tunable via upstreams[].peak_ewma (decay tau and the initial cost); defaults are 10 s decay and a 250 ms initial cost. Carried across rebuilds by address:port, exactly like in-flight counters and health trackers.

Trait Implementations

impl Clone for LoadBalancer

fn clone(&self) -> LoadBalancer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LoadBalancer

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LoadBalancer

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for LoadBalancer

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for LoadBalancer

fn eq(&self, other: &LoadBalancer) -> 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 LoadBalancer

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for LoadBalancer

impl Eq for LoadBalancer

impl StructuralPartialEq for LoadBalancer