管理节点执行：

[root@ndb-manager mysql-cluster]# ndb_mgm
-- NDB Cluster -- Management Client --
ndb_mgm> 
ndb_mgm> start backup 2017021601
Connected to Management Server at: 10.158.1.98:1186
Waiting for completed, this may take several minutes
Node 2: Backup 2017021601 started from node 1
Node 2: Backup 2017021601 started from node 1 completed
 StartGCP: 1357 StopGCP: 1360
 #Records: 2055 #LogRecords: 0
 Data: 50812 bytes Log: 0 bytes
ndb_mgm>

备份数据会被自动存放在【数据节点】的MySQL数据目录下的【BACKUP】中（该目录如果不存在，会自动创建）。
具体如下：

[root@ndb-node1 ~]# ls -ltr /var/lib/mysql/
total 68
drwxr-xr-x 2 root  root      6 Feb 16 14:53 ndb_data
drwxr-xr-x 2 root  root      6 Feb 16 14:58 database_data
-rw-r----- 1 mysql mysql  3092 Feb 16 14:58 mysql-error.log
drwxr-x--- 9 root  root     72 Feb 16 15:33 ndb_2_fs
-rw-r--r-- 1 root  root      5 Feb 16 16:25 ndb_2.pid
drwxr-x--- 3 root  root     30 Feb 16 16:30 BACKUP
-rw-r--r-- 1 root  root  60012 Feb 16 16:30 ndb_2_out.log
[root@ndb-node1 ~]# 
[root@ndb-node1 ~]# ls -ltr /var/lib/mysql/BACKUP/
total 0
drwxr-x--- 2 root root 99 Feb 16 16:30 BACKUP-2017021601
[root@ndb-node1 ~]# 
[root@ndb-node1 ~]# ls -ltr /var/lib/mysql/BACKUP/BACKUP-2017021601/
total 56
-rw-r--r-- 1 root root    52 Feb 16 16:30 BACKUP-2017021601.2.log
-rw-r--r-- 1 root root 20720 Feb 16 16:30 BACKUP-2017021601.2.ctl
-rw-r--r-- 1 root root 26020 Feb 16 16:30 BACKUP-2017021601-0.2.Data
[root@ndb-node1 ~]#

——————————
Done。