Struct TtlConfig 

pub struct TtlConfig {
    pub base_s: u32,
    pub min_s: u32,
    pub max_s: u32,
    pub grow_num: u32,
    pub grow_den: u32,
    pub cut_num: u32,
    pub cut_den: u32,
    pub importance_bias_permille: u32,
}

Adaptive-TTL policy. All fields are settable; defaults suit documentation corpora (hours-scale freshness, month-scale ceiling).

Fields

base_s: u32

Interval assigned to a newly ingested node, seconds.

min_s: u32

Floor, seconds.

max_s: u32

Ceiling, seconds.

grow_num: u32

Growth ratio numerator (applied per consecutive Unchanged).

grow_den: u32

Growth ratio denominator.

cut_num: u32

Cut ratio numerator (applied on Changed).

cut_den: u32

Cut ratio denominator.

importance_bias_permille: u32

How strongly importance shortens the effective interval, in permille: a top-ranked node’s interval is scaled by (1000 - bias) / 1000.

Implementations

impl TtlConfig

pub fn next_interval(&self, interval_s: u32, outcome: Outcome) -> u32

The next stored interval after observing outcome with the current interval_s. Gone keeps the interval (the node is tombstoned and leaves the schedule); Error schedules a floor-interval retry.

pub fn next_check_at_ms( &self, fetched_at_ms: u64, interval_s: u32, rank_permille: u16, ) -> u64

When the node is next due, given its rank percentile in permille. Higher rank ⇒ shorter effective interval, down to (1000-bias)/1000.

Trait Implementations

impl Clone for TtlConfig

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TtlConfig

impl Debug for TtlConfig

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

Formats the value using the given formatter.

impl Default for TtlConfig

fn default() -> Self

Returns the “default value” for a type.

impl Eq for TtlConfig

impl PartialEq for TtlConfig

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for TtlConfig