#define MEMCACHED_EXPIRATION_NOT_ADD 0xffffffffU
#define MEMCACHED_VERSION_STRING_LENGTH 24
#define MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH 20
+#define MEMCACHED_SERVER_FAILURE_LIMIT 5
+#define MEMCACHED_SERVER_FAILURE_RETRY_TIMEOUT 2
enum memcached_server_distribution_t {