About

This contains two different implementations of the ketama algorithm for memcache (particularly, bfitz's memcache client available at https://github.com/bradfitz/gomemcache/). It was written using and for the Go programming language.

One implementation (cketama) uses the libketama C library, the other is a pure Go implementation.

Installing

Using go install

(Install libketama.so using your favorite package manager)
$ go install github.com/rckclmbr/goketama/cketama

or

$ go install github.com/rckclmbr/goketama/ketama

Example

import (
        "github.com/rckclmbr/goketama/cketama"
        "github.com/bradfitz/gomemcache/memcache"
)

func main() {
     selector := cketama.NewFromFile("/path/to/servers.txt")
     mc := memcache.NewFromSelector(selector)
     mc.Set(&memcache.Item{Key: "foo", Value: []byte("my value")})

     it, err := mc.Get("foo")
     ...
}

Drawbacks

The following are features that should be implemented, but haven't yet:

• Ability to poll/check the file for changes. Right now it either requires creating a new selector, or restarting the server.
• No concurrency/locking in Go version