printf("key: %s\nexpires: %llu\n", argv[optind], (unsigned long long)opt_expire);
rc = memcached_delete(memc, argv[optind], strlen(argv[optind]), opt_expire);
printf("key: %s\nexpires: %llu\n", argv[optind], (unsigned long long)opt_expire);
rc = memcached_delete(memc, argv[optind], strlen(argv[optind]), opt_expire);