wrr

Documentation

Overview

Package wrr contains the interface and common implementations of wrr algorithms.

Index

• type WRR
  • func NewEDF() WRR
  • func NewRandom() WRR

Types

type WRR

type WRR interface {
	// Add adds an item with weight to the WRR set. Add must be only called
	// before any calls to Next.
	Add(item any, weight int64)
	// Next returns the next picked item.
	//
	// Next needs to be thread safe. Add may not be called after any call to
	// Next.
	Next() any
}

WRR defines an interface that implements weighted round robin.

func NewEDF

func NewEDF() WRR

NewEDF creates Earliest Deadline First (EDF) (https://en.wikipedia.org/wiki/Earliest_deadline_first_scheduling) implementation for weighted round robin. Each pick from the schedule has the earliest deadline entry selected. Entries have deadlines set at current time + 1 / weight, providing weighted round robin behavior with O(log n) pick time.

func NewRandom

func NewRandom() WRR

NewRandom creates a new WRR with random.