PHP Memcached failover

gistfile1.php

<?php
$mem = new Memcached("pool");

$mem->setOption(Memcached::OPT_BINARY_PROTOCOL, true);
$mem->setOption(Memcached::OPT_DISTRIBUTION, Memcached::DISTRIBUTION_CONSISTENT);
$mem->setOption(Memcached::OPT_LIBKETAMA_COMPATIBLE, true);
$mem->setOption(Memcached::OPT_NO_BLOCK, true);
$mem->setOption(Memcached::OPT_SERVER_FAILURE_LIMIT, 1);
$mem->setOption(Memcached::OPT_RETRY_TIMEOUT, 30);
$mem->setOption(29, 2);


if (!count($mem->getServerList())) {
	$mem->addServers(array(
		array('127.0.0.1', 10001),
		array('127.0.0.1', 10002),
		array('127.0.0.1', 10003),
	));
}