memcached/examples/consistent_hashing.js

A fully featured Memcached API client, supporting both single and clustered Memcached servers through consistent hashing and failover/failure. Memcached is rewrite of nMemcached, which will be deprecated in the near future.

var HashRing = require( '../lib/hashring' ).HashRing;

var Ring = new HashRing(
		[ '192.168.0.102:11212', '192.168.0.103:11212', '192.168.0.104:11212' ],

		// Weights are optional, but can be usefull if you have memcached server that can use allot of memory
		{
			'192.168.0.102:11212': 1,
			'192.168.0.103:11212': 2,
			'192.168.0.104:11212': 1
		}
	);

// Return the server based on the key
process.stdout.write( Ring.get( "my-super-secret-cache-key" ) );
process.stdout.write( Ring.get( "hello-world" ) );
process.stdout.write( Ring.get( "my-super-secret-cache-key" ) );

// Different algorithms produce different hash maps. So choose wisely
var sha1Ring  = new HashRing(
		[ '192.168.0.102:11212', '192.168.0.103:11212', '192.168.0.104:11212' ],

		// Weights are optional, but can be usefull if you have memcached server that can use allot of memory
		{
			'192.168.0.102:11212': 1,
			'192.168.0.103:11212': 2,
			'192.168.0.104:11212': 1
		},

		'sha1' // optional algorithm for key hashing
	);

process.stdout.write( sha1Ring.get( "my-super-secret-cache-key" ) );
process.stdout.write( sha1Ring.get( "hello-world" ) );
process.stdout.write( sha1Ring.get( "my-super-secret-cache-key" ) );