MySQL Cluster 备份与恢复
- 1、在管理节点上进行备份。
- ndb_mgm> start backup
- ndb_mgm> shutdown
- ndb_mgm> exit
- 2、删掉SQL节点的数据。
- DROP DATABASE TEST_CLUSTER;
- 3、关闭MYSQLD服务器。
- [root@localhost bin]# service mysqld stop
- Shutting down MySQL... SUCCESS!
- 4、重新顺序启动所有节点。
- [root@localhost mysql]#ndb_mgmd -f /etc/config.ini --reload
- [root@localhost data]#ndbd --initial
- 我发现如果不带这个 --initial选项的话，恢复会失败。
- [root@localhost bin]# service mysqld start
- //我用的7.0.8a版rpm 安装<b>service mysqld start</b>无法启动，用、、
- //[root@localhost ~]# mysqld_safe &
- 4、在NDBD节点上进行恢复。（每个节点都得执行一次，因为数据分散在两个节点上）
- 第一个节点：
- [root@localhost BACKUP]# /usr/local/mysql/bin/ndb_restore -n3 -b4 -r -m --backup_path=/usr/local/mysql/data/BACKUP/BACKUP-4/
- -r开关是记录集合。
- -m是元数据。就是表和库的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
- 第二个节点：
- [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
- 这里完成。
- 5、查看一下有没有数据，为了安全起见。
- mysql> show databases;
- +--------------------+
- | Database |
- +--------------------+
- | information_schema |
- | mysql |
- | test |
- +--------------------+
- 3 rows in set (0.00 sec)
- 没有恢复的数据库？
- MYSQL现在必须重新建立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 |
- | ... |
- +------------------------------+
- 27 rows in set (0.11 sec)
- mysql> select * from cs_comment;
- Empty set (0.00 sec)
- 不过MYSQL的backup 程序现在还只能进行完全备份。
- [root@localhost BACKUP]# du -h
- 76K ./BACKUP-2
- 96K ./BACKUP-6
- 180K ./BACKUP-4
- 172K ./BACKUP-3
- 76K ./BACKUP-1
- 60K ./BACKUP-5
- 668K .
- 6、在NDBD节点上进行恢复的时候有一个要注意的问题。
- 因为NDBD节点以 --initial 方式启动的时候不会自动删除undo 和 data 文件（即保存到磁盘上的表数据），所以得手动在每个NDBD节点上进行RM操作：
- [root@node239 ndb_6_fs]# rm -rf *.dat
- 然后开始备份。
- 在MASTER上备份的时候要加 -m 开关。
- 在SLAVE上要加-d 而且不要-m开关。
- 具体步骤如下：
- 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 开关的意思即：
- -d, --no-restore-disk-objects
- Dont restore disk objects (tablespace/logfilegroups etc)
- 既忽略表空间和分组空间
1、在管理节点上进行备份。
ndb_mgm> start backup
ndb_mgm> shutdown
ndb_mgm> exit
2、删掉SQL节点的数据。
DROP DATABASE TEST_CLUSTER;
3、关闭MYSQLD服务器。
[root@localhost bin]# service mysqld stop
Shutting down MySQL... SUCCESS!
4、重新顺序启动所有节点。
[root@localhost mysql]#ndb_mgmd -f /etc/config.ini --reload
[root@localhost data]#ndbd --initial
我发现如果不带这个 --initial选项的话，恢复会失败。
[root@localhost bin]# service mysqld start
//我用的7.0.8a版rpm 安装<b>service mysqld start</b>无法启动，用、、
//[root@localhost ~]# mysqld_safe &
4、在NDBD节点上进行恢复。（每个节点都得执行一次，因为数据分散在两个节点上）
第一个节点：
[root@localhost BACKUP]# /usr/local/mysql/bin/ndb_restore -n3 -b4 -r -m --backup_path=/usr/local/mysql/data/BACKUP/BACKUP-4/
-r开关是记录集合。
-m是元数据。就是表和库的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
第二个节点：
[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$BLOB_2_3(3) fragment 1
_____________________________________________________
Processing data in table: test/def/t11(5) fragment 1
_____________________________________________________
Processing data in table: sys/def/SYSTAB_0(0) fragment 1
_____________________________________________________
Processing data in table: mysql/def/ndb_schema(2) fragment 1
Restored 2 tuples and 0 log entries
NDBT_ProgramExit: 0 - OK
这里完成。
5、查看一下有没有数据，为了安全起见。
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| test |
+--------------------+
3 rows in set (0.00 sec)
没有恢复的数据库？
MYSQL现在必须重新建立SCHEMA。
mysql> create database test_cluster;
Query OK, 1 row affected (0.33 sec)
mysql> use test_cluster;
Database changed
mysql> show tables;
+------------------------------+
| Tables_in_test_cluster |
+------------------------------+
| lk4_test |
| ... |
+------------------------------+
27 rows in set (0.11 sec)
mysql> select * from cs_comment;
Empty set (0.00 sec)
不过MYSQL的backup 程序现在还只能进行完全备份。
[root@localhost BACKUP]# du -h
76K ./BACKUP-2
96K ./BACKUP-6
180K ./BACKUP-4
172K ./BACKUP-3
76K ./BACKUP-1
60K ./BACKUP-5
668K .
6、在NDBD节点上进行恢复的时候有一个要注意的问题。
因为NDBD节点以 --initial 方式启动的时候不会自动删除undo 和 data 文件（即保存到磁盘上的表数据），所以得手动在每个NDBD节点上进行RM操作：
[root@node239 ndb_6_fs]# rm -rf *.dat
然后开始备份。
在MASTER上备份的时候要加 -m 开关。
在SLAVE上要加-d 而且不要-m开关。
具体步骤如下：
MASTER :
[root@localhost ndb_3_fs]# /usr/local/mysql/bin/ndb_restore -n3 -b1 -r -m --backup_path=/usr/local/mysql/data/BACKUP/BACKUP-1/
Nodeid = 3
Backup Id = 1
backup path = /usr/local/mysql/data/BACKUP/BACKUP-1/
Ndb version in backup files: Version 5.1.21
Connected to ndb!!
Creating logfile group: lg_1...done
Creating tablespace: ts_1...done
Creating datafile "data_1.dat"...done
Creating undofile "undo_1.dat"...done
Successfully restored table `test/def/t11`
Successfully restored table event REPL$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 开关的意思即：
-d, --no-restore-disk-objects
Dont restore disk objects (tablespace/logfilegroups etc)
既忽略表空间和分组空间
异常：
[root@localhost ~]# ndb_restore -n2 -b2 -r -m --backup_path=/var/lib/mysql-cluster/BACKUP/BACKUP-2
Nodeid = 2
Backup Id = 2
backup path = /var/lib/mysql-cluster/BACKUP/BACKUP-2
Opening file '/var/lib/mysql-cluster/BACKUP/BACKUP-2/BACKUP-2.2.ctl'
Backup version in files: ndb-6.3.11 ndb version: mysql-5.1.37 ndb-7.0.8
Stop GCP of Backup: 0
Configuration error: Error : Could not alloc node id at 192.168.8.120 port 1186: Connection done from wrong host ip 192.168.8.121.
Failed to initialize consumers
NDBT_ProgramExit: 1 - Failed
解决：管理节点配置文件添加
[mysqld]
//空节点
come from http://xylonwang.iteye.com/blog/563063