if (memcached_failed(rc))
{
std::cerr << "Error occrrured during memcached_set(): " << memcached_last_error_message(memc) << std::endl;
if (memcached_failed(rc))
{
std::cerr << "Error occrrured during memcached_set(): " << memcached_last_error_message(memc) << std::endl;