mysql-cluster的備份與還原

測試start backup

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//備份概念

1.備份時當前數據庫的一個快照，備份包含下面三部分

A.metadata:數據庫的定義和結構

B.table records:存儲在表中到數據

C.transaction log: 記錄數據存儲的時間

2.每一個備份存儲在全部的節點上，備份文件由三個文件組成：

BACKUP-backup_id.node_id.ctl

BACKUP-backup_id-0.node_id.data

BACKUP-backup_id.node_id.log

3.backup_id標識每一次備份，node_id表示建立備份文件的節點

//start backup語法

START BACKUP [backup_id] [wait_option] [snapshot_option]

backup_id:大於等於1的整數，不能重複

wait_option:WAIT {STARTED | COMPLETED}

wait started:等待直到備份啓動  默認

wait completed ：等待備份完成

snapshot_option:

SNAPSHOTSTART | SNAPSHOTEND

SNAPSHOTSTART:匹配備份開始時集羣的狀態

SNAPSHOTEND: 備份反映備份完成時集羣到狀態 默認

//備份操做 

1.在管理節點上進行

ndb_mgm> start backup 7 wait completed snapshotstart

Waiting for completed, this may take several minutes

Node 2: Backup 7 started from node 1

Node 2: Backup 7 started from node 1 completed

 StartGCP: 4696 StopGCP: 4699

 #Records: 2073 #LogRecords: 0

 Data: 54164 bytes Log: 0 bytes

2.在node=3上查看數據節點備份文件

/data/backup/BACKUP/BACKUP-6

shell> ll

-rw-r--r-- 1 root root 14056 2月  28 09:54 BACKUP-6-0.3.Data

-rw-r--r-- 1 root root 25616 2月  28 09:54 BACKUP-6.3.ctl

-rw-r--r-- 1 root root    52 2月  28 09:54 BACKUP-6.3.log

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測試ndb_restore

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1.環境介紹

管理節點:154

四臺 data/sql節點:154/155/156/157

2.cluster當前狀態

[ndbd(NDB)] 4 node(s)

id=2 @10.10.54.154  (mysql-5.5.35 ndb-7.2.15, Nodegroup: 0, *)

id=3 @10.10.54.155  (mysql-5.5.35 ndb-7.2.15, Nodegroup: 0)

id=4 @10.10.54.156  (mysql-5.5.35 ndb-7.2.15, Nodegroup: 1)

id=5 @10.10.54.157  (mysql-5.5.35 ndb-7.2.15, Nodegroup: 1)

[ndb_mgmd(MGM)] 1 node(s)

id=1 @10.10.54.154  (mysql-5.5.35 ndb-7.2.15)

[mysqld(API)] 8 node(s)

id=7 @10.10.54.154  (mysql-5.5.35 ndb-7.2.15)

id=9 @10.10.54.155  (mysql-5.5.35 ndb-7.2.15)

id=10 @10.10.54.156  (mysql-5.5.35 ndb-7.2.15)

id=11 @10.10.54.157  (mysql-5.5.35 ndb-7.2.15)

id=12 (not connected, accepting connect from any host)

id=13 (not connected, accepting connect from any host)

id=14 (not connected, accepting connect from any host)

id=15 (not connected, accepting connect from any host)

3.全部數據節點上數據庫狀態

mysql> show databases;

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

| Database           |

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

| information_schema |

| employees          |

| mysql              |

| ndb_2_fs           |

| ndbinfo            |

| performance_schema |

| test               |

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

//管理機:先建立新數據庫和表，而後執行備份命令

1.建立測試數據

mysql> create database d1;

mysql> use d1;

mysql> create table d1_t1(id int NOT NULL) engine=ndb;

mysql> create table d1_t2(id int NOT NULL) engine=ndb;

mysql> insert into d1_t1 values(1),(2);

mysql> insert into d1_t2 values(1),(2);

mysql> show tables;

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

| Tables_in_d1 |

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

| d1_t1        |

| d1_t2        |

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

2.執行備份命令

ndb_mgm> start backup 4

Waiting for completed, this may take several minutes

Node 2: Backup 4 started from node 1

Node 2: Backup 4 started from node 1 completed

 StartGCP: 540 StopGCP: 543

 #Records: 2070 #LogRecords: 0

 Data: 53152 bytes Log: 0 bytes

//關閉並重啓cluster

關閉順序 

sql節點---data節點---管理節點

啓動cluster

1.啓動管理節點

shell> ndb_mgmd -f /var/lib/mysql-cluster/config.ini

2.開啓data節點

shell> ndbd --initial #--initial操做會清空全部表和數據

2014-02-28 13:19:25 [ndbd] INFO     -- Angel connected to '10.10.54.154:1186'

2014-02-28 13:19:25 [ndbd] INFO     -- Angel allocated nodeid: 2

3.開啓sql節點

/etc/init.d/mysqld start

//再次建立新數據庫和表，驗證增量備份

1.建立新數據庫

mysql> create database d2;

mysql> use d2;

mysql> create table d2_t1(id int NOT NULL) engine=ndb;

mysql> insert into d2_t1 values(1),(2);

mysql> show tables;

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

| Tables_in_d2 |

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

| d2_t1        |

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

//恢復數據，並查看數據庫中數據

1.說明

A.以前的操做流程爲:

建立d1----備份----建立d2&&刪除d1----恢復數據

B.恢復數據後驗證的是:

d1數據庫被恢復，d2數據庫仍保留

2.在四個data節點上都執行恢復操做

shell> ndb_restore -c 10.10.54.154 -n 2 -m -b 4 -r /data/backup/BACKUP/BACKUP-4/

shell> ndb_restore -c 10.10.54.154 -n 3 -b 4 -r /data/backup/BACKUP/BACKUP-4/

shell> ndb_restore -c 10.10.54.154 -n 4 -b 4 -r /data/backup/BACKUP/BACKUP-4/

shell> ndb_restore -c 10.10.54.154 -n 5 -b 4 -r /data/backup/BACKUP/BACKUP-4/

 #-c:管理節點

 #-n:當前恢復節點，變化

 #-m:第一次恢復時須要加

 #-b:執行備份時的備份id

 #-r:備份文件位置

3.部分結果

shell> ndb_restore -c 10.10.54.154 -n 2 -m -b 4 -r /data/backup/BACKUP/BACKUP-4/

Nodeid = 2

Backup Id = 4

backup path = /data/backup/BACKUP/BACKUP-4/

Opening file '/data/backup/BACKUP/BACKUP-4/BACKUP-4.2.ctl'

File size 23040 bytes

Backup version in files: ndb-6.3.11 ndb version: mysql-5.5.35 ndb-7.2.15

Stop GCP of Backup: 542

Connected to ndb!!

Successfully restored table `d1/def/d1_t1`

Successfully restored table event REPL$d1/d1_t1

...

NDBT_ProgramExit: 0 - OK

4.驗證d1數據庫恢復，d2保留

mysql> show databases;

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

| Database           |

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

| information_schema |

| d1                 |

| d2                 |

...

mysql> use d1;

mysql> show tables;

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

| Tables_in_d1 |

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

| d1_t2        |

| d1_t1        |

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

###d1數據庫中的表成功恢復

mysql> use d2;

mysql> show tables;

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

| Tables_in_d2 |

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

| d2_t1        |

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

mysql> select * from d2_t1;

+----+

| id |

+----+

|  2 |

|  1 |

+----+

###d2數據庫中的數據被保留