if ((memcached_io_writev(instance, vector, 4, false)) == -1)
{
fprintf(stderr, "%s:%d (%s)\n", __FILE__, __LINE__,__func__);fflush(stdout);
if ((memcached_io_writev(instance, vector, 4, false)) == -1)
{
fprintf(stderr, "%s:%d (%s)\n", __FILE__, __LINE__,__func__);fflush(stdout);