/**
  * @param $key
  * @return Redis
  */
 private function getRedis($key)
 {
     $pos = $this->getHash($key);
     $node = $this->hash->findNode($pos);
     $conn = $this->nodeMap[$node];
     $redis = $this->connect($conn);
     //echo "$key => $conn\n";
     return $redis;
 }
function testFindOne($i, $pos, $idList)
{
    $hash = new Hashing($idList);
    $result = $hash->findNode($pos);
    assert($i == $result);
    echo '.';
}