A Golang implementation of Consistent Hashing and Consistent Hashing With Bounded Loads.
https://en.wikipedia.org/wiki/Consistent_hashing
https://research.googleblog.com/2017/04/consistent-hashing-with-bounded-loads.html
package main
import (
"log"
"github.com/lafikl/consistent"
)
func main() {
c := consistent.New()
// adds the hosts to the ring
c.Add("127.0.0.1:8000")
c.Add("92.0.0.1:8000")
// Returns the host that owns `key`.
//
// As described in https://en.wikipedia.org/wiki/Consistent_hashing
//
// It returns ErrNoHosts if the ring has no hosts in it.
host, err := c.Get("/app.html")
if err != nil {
log.Fatal(err)
}
log.Println(host)
}
package main
import (
"log"
"github.com/lafikl/consistent"
)
func main() {
c := consistent.New()
// adds the hosts to the ring
c.Add("127.0.0.1:8000")
c.Add("92.0.0.1:8000")
// It uses Consistent Hashing With Bounded loads
// https://research.googleblog.com/2017/04/consistent-hashing-with-bounded-loads.html
// to pick the least loaded host that can serve the key
//
// It returns ErrNoHosts if the ring has no hosts in it.
//
host, err := c.GetLeast("/app.html")
if err != nil {
log.Fatal(err)
}
// increases the load of `host`, we have to call it before sending the request
c.Inc(host)
// send request or do whatever
log.Println("send request to", host)
// call it when the work is done, to update the load of `host`.
c.Done(host)
}
https://godoc.org/github.com/lafikl/consistent
MIT License
Copyright (c) 2017 Khalid Lafi
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