1、在管理節點上進行備份。

ndb_mgm> start backup nowait

ndb_mgm> Node 3: Backup 4 started from node 1

Node 3: Backup 4 started from node 1 completed

StartGCP: 43010 StopGCP: 43013

#Records: 2138 #LogRecords: 0

Data: 53068 bytes Log: 0 bytes

ndb_mgm> shutdown

Node 3: Cluster shutdown initiated

Node 4: Cluster shutdown initiated

Node 4: Node shutdown completed.

Node 3: Node shutdown completed.

NDB Cluster node(s) have shutdown.

Disconnecting to allow management server to shutdown.

ndb_mgm> exit

2、刪掉SQL節點的數據。

DROP DATABASE TEST_CLUSTER;

、關閉MYSQLD服務器。

[root@localhost bin]# service mysqld stop

Shutting down MySQL... SUCCESS!

3、重新順序啟動所有節點。

[root@localhost mysql]# /usr/local/mysql/ndb_mgmd -f /etc/config.ini

[root@localhost data]# /usr/local/mysql/bin/ndbd --initial

我發現如果不帶這個 --initial選項的話，恢復會失敗。

[root@localhost bin]# service mysqld start

Starting MySQL SUCCESS!

4、在NDBD節點上進行恢復。(每個節點都得執行一次，因為數據分散在兩個節點上)

第一個節點：

[root@localhost BACKUP]# /usr/local/mysql/bin/ndb_restore -n3 -b4 -r -m --backup_path=/usr/local/mysql/data/BACKUP/BACKUP-4/

-r開關是記錄集合。

-m是元數據。就是表和庫的SCHEMA。

Nodeid = 3

Backup Id = 4

backup path = /usr/local/mysql/data/BACKUP/BACKUP-4/

Ndb version in backup files: Version 5.1.21

Connected to ndb!!

Successfully restored table `test_cluster/def/lk4_test`

...

Successfully created index `PRIMARY` on `lk4_test`

...

_____________________________________________________

Processing data in table: test_cluster/def/lk4_test54) fragment 1

_____________________________________________________

...

Restored 37 tuples and 0 log entries

NDBT_ProgramExit: 0 - OK

第二個節點：

[root@localhost BACKUP-1]# /usr/local/mysql/bin/ndb_restore -n4 -b4 -r --backup_path=/usr/local/mysql/data/BACKUP/BACKUP-4/

Nodeid = 4

Backup Id = 4

backup path = /usr/local/mysql/data/BACKUP/BACKUP-4/

Ndb version in backup files: Version 5.1.21

Connected to ndb!!

_____________________________________________________

Processing data in table: sys/def/NDB$EVENTS_0(1) fragment 1

_____________________________________________________

Processing data in table: mysql/def/ndb_apply_status(4) fragment 1

_____________________________________________________

Processing data in table: mysql/def/NDB$BLOB_2_3(3) fragment 1

_____________________________________________________

Processing data in table: test/def/t11(5) fragment 1

_____________________________________________________

Processing data in table: sys/def/SYSTAB_0(0) fragment 1

_____________________________________________________

Processing data in table: mysql/def/ndb_schema(2) fragment 1

Restored 2 tuples and 0 log entries

NDBT_ProgramExit: 0 - OK

這里完成。

5、查看一下有沒有數據，為了安全起見。

mysql> show databases;

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

| Database |

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

| information_schema |

| mysql |

| test |

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

rows in set (0.00 sec)

沒有恢復的數據庫？

MYSQL現在必須重新建立SCHEMA。

mysql> create database test_cluster;

Query OK, 1 row affected (0.33 sec)

mysql> use test_cluster;

Database changed

mysql> show tables;

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

| Tables_in_test_cluster |

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

| lk4_test |

| ... |

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

rows in set (0.11 sec)

mysql> select * from cs_comment;

Empty set (0.00 sec)

不過MYSQL的backup 程序現在還只能進行完全備份。

[root@localhost BACKUP]# du -h

K ./BACKUP-2

K ./BACKUP-6

K ./BACKUP-4

K ./BACKUP-3

K ./BACKUP-1

K ./BACKUP-5

K .

6、在NDBD節點上進行恢復的時候有一個要注意的問題。

因為NDBD節點以 --initial 方式啟動的時候不會自動刪除undo 和 data 文件(即保存到磁盤上的表數據)，所以得手動在每個NDBD節點上進行RM操作：

[root@node239 ndb_6_fs]# rm -rf *.dat

然后開始備份。

在MASTER上備份的時候要加 -m 開關。

在SLAVE上要加-d 而且不要-m開關。

具體步驟如下：

MASTER :

[root@localhost ndb_3_fs]# /usr/local/mysql/bin/ndb_restore -n3 -b1 -r -m --backup_path=/usr/local/mysql/data/BACKUP/BACKUP-1/

Nodeid = 3

Backup Id = 1

backup path = /usr/local/mysql/data/BACKUP/BACKUP-1/

Ndb version in backup files: Version 5.1.21

Connected to ndb!!

Creating logfile group: lg_1...done

Creating tablespace: ts_1...done

Creating datafile "data_1.dat"...done

Creating undofile "undo_1.dat"...done

Successfully restored table `test/def/t11`

Successfully restored table event REPL$test/t11

_____________________________________________________

Processing data in table: sys/def/NDB$EVENTS_0(1) fragment 0

_____________________________________________________

Processing data in table: mysql/def/NDB$BLOB_2_3(3) fragment 0

_____________________________________________________

Processing data in table: sys/def/SYSTAB_0(0) fragment 0

_____________________________________________________

Processing data in table: mysql/def/ndb_schema(2) fragment 0

_____________________________________________________

Processing data in table: mysql/def/ndb_apply_status(4) fragment 0

_____________________________________________________

Processing data in table: test/def/t11(10) fragment 0

Restored 26 tuples and 0 log entries

NDBT_ProgramExit: 0 - OK

其他的SLAVE上的操作：

[root@node239 ndb_6_fs]# /usr/local/mysql/bin/ndb_restore -n6 -b1 -r -d --backup_path=/usr/local/mysql/data/BACKUP/BACKUP-1/

Nodeid = 6

Backup Id = 1

backup path = /usr/local/mysql/data/BACKUP/BACKUP-1/

Ndb version in backup files: Version 5.1.21

Connected to ndb!!

_____________________________________________________

Processing data in table: sys/def/NDB$EVENTS_0(1) fragment 3

_____________________________________________________

Processing data in table: mysql/def/NDB$BLOB_2_3(3) fragment 3

_____________________________________________________

Processing data in table: sys/def/SYSTAB_0(0) fragment 3

_____________________________________________________

Processing data in table: mysql/def/ndb_schema(2) fragment 3

_____________________________________________________

Processing data in table: mysql/def/ndb_apply_status(4) fragment 3

_____________________________________________________

Processing data in table: test/def/t11(10) fragment 3

Restored 20 tuples and 0 log entries

NDBT_ProgramExit: 0 - OK

-d 開關的意思即：

-d, --no-restore-disk-objects

Dont restore disk objects (tablespace/logfilegroups etc)

既忽略表空間和分組空間

總結

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