九：破坏性测试:

1,关闭其中一个数据节点,验证结果表明,集群工作正常,

以下操作在数据节点2[192.168.133.102]上执行,如下:

[root@localhost bin]# ps -ef | grep ndbd

root      7541     1  0 01:52 ?        00:00:00 ./ndbd –nodeid=3 –initial

root      7542  7541  0 01:52 ?        00:02:39 ./ndbd –nodeid=3 –initial

root      9931  3295  0 20:47 pts/1    00:00:00 grep ndbd

[root@localhost bin]# kill 7541 7542

[root@localhost bin]# ps -ef | grep ndbd

root      9933  3295  0 20:47 pts/1    00:00:00 grep ndbd

[root@localhost bin]# ifconfig

eth0      Link encap:Ethernet  HWaddr 00:50:56:B8:00:13

inet addr:192.168.133.102  Bcast:192.168.133.255  Mask:255.255.255.0

inet6 addr: fe80::250:56ff:feb8:13/64 Scope:Link

UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

RX packets:19511513 errors:0 dropped:0 overruns:0 frame.:0

TX packets:19957492 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:1781288143 (1.6 GiB)  TX bytes:1899963551 (1.7 GiB)

Base address:0x2000 Memory:d8920000-d8940000

lo        Link encap:Local Loopback

inet addr:127.0.0.1  Mask:255.0.0.0

inet6 addr: ::1/128 Scope:Host

UP LOOPBACK RUNNING  MTU:16436  Metric:1

RX packets:597990 errors:0 dropped:0 overruns:0 frame.:0

TX packets:597990 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:51521498 (49.1 MiB)  TX bytes:51521498 (49.1 MiB)

[root@localhost bin]#

--------------------------------------------------------------------------------

十：去管理节点看集群的状态:

ndb_mgm> show

Cluster Configuration

---------------------

[ndbd(NDB)]     2 node(s)

id=2    @192.168.133.101  (Version: 7.1.10, Nodegroup: 0, Master)

id=3 (not connected, accepting connect from 192.168.133.102)

[ndb_mgmd(MGM)] 1 node(s)

id=1    @192.168.133.98  (Version: 7.1.10)

[MySQLd(API)]   2 node(s)

id=4    @192.168.133.62  (Version: 7.1.10)

id=5    @192.168.133.100  (Version: 7.1.10)

ndb_mgm>

表明192.168.133.102上的数据节点确实当掉了.

去mysql节点1[192.168.133.62]做如下操作:

[root@localhost setup]# mysql

[root@localhost setup]# ifconfig

eth0      Link encap:Ethernet  HWaddr 00:50:56:B8:00:0F

inet addr:192.168.133.62  Bcast:192.168.133.255  Mask:255.255.255.0

inet6 addr: fe80::250:56ff:feb8:f/64 Scope:Link

UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

RX packets:7603400 errors:0 dropped:0 overruns:0 frame.:0

TX packets:4072260 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:684602777 (652.8 MiB)  TX bytes:402432650 (383.7 MiB)

Base address:0x2000 Memory:d8920000-d8940000

lo        Link encap:Local Loopback

inet addr:127.0.0.1  Mask:255.0.0.0

inet6 addr: ::1/128 Scope:Host

UP LOOPBACK RUNNING  MTU:16436  Metric:1

RX packets:203352 errors:0 dropped:0 overruns:0 frame.:0

TX packets:203352 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:11961759 (11.4 MiB)  TX bytes:11961759 (11.4 MiB)

[root@localhost setup]# mysql

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 9

Server version: 5.1.51-ndb-7.1.10-log Source distribution

Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.

This software comes with ABSOLUTELY NO WARRANTY. This is free software,

and you are welcome to modify and redistribute it under the GPL v2 license

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| ndbdatabase        |

| ndbinfo            |

| test               |

+--------------------+

5 rows in set (0.00 sec)

mysql> use ndbdatabase;

Database changed

mysql> show tables;

+-----------------------+

| Tables_in_ndbdatabase |

+-----------------------+

| test                  |

+-----------------------+

1 row in set (0.01 sec)

mysql> select * from test;

+------+

| id   |

+------+

|    1 |

+------+

1 row in set (0.00 sec)

mysql>

以上操作表明在一个数据节点当机后,集群依然工作正常。