Description:
------------
Hi,

I use Memcached server via Zend_Cache component. I use a load balanced architecture with 2 web servers (apache).

When I want to delete an item, I expect the delete() method would perform the operation on both servers I put. But it is not the case.

If it makes sense on getting items, to my mind, deletes and updates should be applied on the server pools... no?

Many thx for this great interface,
Wilfried

Reproduce code:
---------------
function getMemcache($port)
{
    $memcache = new Memcache;
    $memcache->addServer('localhost', $port) or die ('Could not connect #' . $port);
    return $memcache;
}

//--- SET !
$memcache = getMemcache(11214);
echo 'add(#11214): '; var_dump($memcache->add('KEY', 'data#11214'));
$memcache = getMemcache(11213);
echo 'add(#11213): '; var_dump($memcache->add('KEY', 'data#11213'));

//--- GET !
$memcache = getMemcache(11214);
echo 'get(#11214): '; var_dump($memcache->get('KEY'));
$memcache = getMemcache(11213);
echo 'get(#11213): '; var_dump($memcache->get('KEY'));

//--- DELETE ALL (try to...)
$memcache = new Memcache;
$memcache->addServer('localhost', 11214) or die ('Could not connect #' . $port);
$memcache->addServer('localhost', 11213) or die ('Could not connect #' . $port);
echo 'delete(#ALL): '; var_dump($memcache->delete('KEY'));

//--- GET !
$memcache = getMemcache(11214);
echo 'get(#11214) => false?: '; var_dump($memcache->get('KEY'));
$memcache = getMemcache(11213);
echo 'get(#11213) => false?: '; var_dump($memcache->get('KEY'));



Expected result:
----------------
add(#11214): bool(true)
add(#11213): bool(true)
get(#11214): string(10) "data#11214"
get(#11213): string(10) "data#11213"
delete(#ALL): bool(true)
get(#11214) => false?: bool(false)
get(#11213) => false?: bool(false)


Actual result:
--------------
add(#11214): bool(true)
add(#11213): bool(true)
get(#11214): string(10) "data#11214"
get(#11213): string(10) "data#11213"
delete(#ALL): bool(true)
get(#11214) => false?: string(10) "data#11214"
get(#11213) => false?: bool(false)