Enum SamplingMode 

pub enum SamplingMode {
    Random {
        rate: f64,
        seed: Option<u64>,
    },
    Systematic {
        interval: u64,
    },
    Hash {
        key: String,
        rate: u8,
        missing_key_behaviour: String,
    },
    Recordbatch {
        rate: f64,
        seed: Option<u64>,
    },
    Stratified {
        field: String,
        strata: HashMap<String, f64>,
        default_rate: f64,
        missing_field_behaviour: String,
        seed: Option<u64>,
    },
    Adaptive {
        base_rate: f64,
        min_rate: f64,
        max_rate: f64,
        error_field: String,
        error_value: String,
        latency_field: Option<String>,
        latency_threshold_ms: u64,
        window_secs: u64,
        sensitivity: f64,
    },
    Reservoir {
        size: usize,
        flush_interval_secs: u64,
    },
    Tail {
        group_key: String,
        decision_window_secs: u64,
        max_groups: usize,
        default_decision: String,
        rules: Vec<TailRuleConfig>,
    },
}

Sampling mode configuration.

The type field selects the sampling algorithm.

Variants

Random

Retain each event independently with a fixed probability.

Fields

rate: f64

Probability of retaining each event. Must be in (0.0, 1.0].

seed: Option<u64>

Optional RNG seed for deterministic sampling.

Systematic

Select every Nth event from the stream.

Fields

interval: u64

Keep every Nth event. Must be >= 1.

Hash

Hash a key field and retain events deterministically.

Fields

key: String

Dot-separated field path to hash.

rate: u8

Percentage of hash space to retain. Must be in [1, 100].

missing_key_behaviour: String

Behaviour when the key field is absent.

Recordbatch

Accept or reject entire batches with a single decision.

Fields

rate: f64

Probability of accepting each batch. Must be in (0.0, 1.0].

seed: Option<u64>

Optional RNG seed for deterministic sampling.

Stratified

Apply per-stratum sampling rates based on a field value.

Fields

field: String

Dot-separated field path to stratify on.

strata: HashMap<String, f64>

Map of stratum value to sampling rate.

default_rate: f64

Sampling rate for values not in strata. Must be in (0.0, 1.0].

missing_field_behaviour: String

Behaviour when the stratum field is absent.

seed: Option<u64>

Optional RNG seed.

Adaptive

Dynamically adjust sampling rate based on error rate and latency.

Fields

base_rate: f64

Starting sampling rate. Must be in (0.0, 1.0].

min_rate: f64

Minimum sampling rate floor.

max_rate: f64

Maximum sampling rate ceiling.

error_field: String

Dot-separated field path whose value indicates an error.

error_value: String

Value of error_field that signals an error.

latency_field: Option<String>

Optional field path for latency values in ms.

latency_threshold_ms: u64

Latency threshold in ms above which the rate increases.

window_secs: u64

Observation window duration in seconds.

sensitivity: f64

Rate adjustment speed multiplier.

Reservoir

Maintain a fixed-size reservoir using Vitter’s Algorithm R.

Fields

size: usize

Maximum number of events in the reservoir.

flush_interval_secs: u64

Interval in seconds at which the reservoir is emitted.

Tail

Buffer events by group key and decide after a window.

Fields

group_key: String

Dot-separated field path to group events by.

decision_window_secs: u64

Seconds to buffer a group before deciding.

max_groups: usize

Maximum concurrent groups in memory.

default_decision: String

Decision when no rule matches.

rules: Vec<TailRuleConfig>

Ordered list of rules. First match wins.

Trait Implementations

impl Clone for SamplingMode

fn clone(&self) -> SamplingMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SamplingMode

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SamplingMode

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl HasEnumMetadata for SamplingMode

fn enum_metadata() -> Vec<String>

Returns a list of metadata for all variants in the enum.

impl HasFieldsMetadata for SamplingMode

fn fields_metadata() -> Vec<FieldMetadata>

Returns a list of metadata for all fields in the struct.

impl HasVariantMetadata for SamplingMode

fn variant_metadata() -> Vec<VariantMetadata>

Returns a list of variant metadata including field schemas.

impl PartialEq for SamplingMode

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

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for SamplingMode