MySQL備份工具一般有哪些

本文主要給大家介紹MySQL備份工具一般有哪些，文章內容都是筆者用心摘選和編輯的，具有一定的針對性，對大家的參考意義還是比較大的，下面跟筆者一起了解下MySQL備份工具一般有哪些吧。

MySQL備份工具

常用的 MySQL 備份工具
? 物理備份缺點
– 跨平臺性差
– 備份時間長、冗余備份、浪費存儲空間
? mysqldump 備份缺點
– 效率較低，備份和還原速度慢
– 備份過程中，數據插入和更新操作會被掛起
XtraBackup 工具
? 一款強大的在線熱備份工具
– 備份過程中不鎖庫表，適合生產環境
– 由專業組織 Percona 提供（改進 MySQL 分
支）
? 主要含兩個組件
– xtrabackup ： C 程序，支持 InnoDB/XtraDB
– innobackupex ：以 Perl 腳本封裝 xtrabackup ，還支持 MyISAM
步驟一：安裝XtraBackup軟件包
1）了解軟件包描述信息

[root@dbsvr1 pub]# rpm -qpi percona-xtrabackup-24-2.4.6-2.el7.x86_64.rpm
Name        : percona-xtrabackup-24
Version     : 2.4.6
Release     : 2.el7
Architecture: x86_64
Install Date: (not installed)
Group       : Applications/Databases
Size        : 32416340
License     : GPLv2
Signature   : DSA/SHA1, 2017年02月27日 星期一 20時28分17秒, Key ID 1c4cbdcdcd2efd2a
Source RPM  : percona-xtrabackup-24-2.4.6-2.el7.src.rpm
Build Date  : 2017年02月27日 星期一 20時27分21秒
Build Host  : vps-centos7-x64-01.ci.percona.com
Relocations : (not relocatable)
URL         : http://www.percona.com/software/percona-xtrabackup
Summary     : XtraBackup online backup for MySQL / InnoDB
Description :
Percona XtraBackup is OpenSource online (non-blockable) backup solution for InnoDB and XtraDB engines

2）安裝依賴包perl-DBD-MySQL perl-Digest-MD5 libev
使用RHEL 7自帶的即可，yum方式安裝：
`[root@dbsvr1 pub]# yum -y install perl-DBD-MySQL perl-Digest-MD5
libev使用網上找的rpm包 libev-4.15-1.el6.rf.x86.rpm
[root@dbsvr1 pub]#rpm –ivh libev-4.15-1.el6.rf.x86_64.rpm``

如果未安裝這些依賴包，則直接安裝percona-xtrabackup時會報錯：
3）安裝percona-xtrabackup

[root@dbsvr1 pub]#rpm -ivh percona-xtrabackup-*.rpm
警告：percona-xtrabackup-24-2.4.6-2.el7.x86_64.rpm: 頭V4 DSA/SHA1 Signature, 密鑰 ID cd2efd2a: NOKEY
準備中...                          ################################# [100%]
正在升級/安裝...
1:percona-xtrabackup-24-2.4.6-2.el7################################# [ 33%]
2:percona-xtrabackup-test-24-2.4.6-################################# [ 67%]
3:percona-xtrabackup-24-debuginfo-2################################# [100%]

4）確認安裝的主要程序/腳本

[root@dbsvr1 pub]# rpm -ql percona-xtrabackup-24-2.4.6-2.el7.x86_64
/usr/bin/innobackupex
/usr/bin/xbcloud
/usr/bin/xbcloud_osenv
/usr/bin/xbcrypt
/usr/bin/xbstream
/usr/bin/xtrabackup
/usr/share/doc/percona-xtrabackup-24-2.4.6
/usr/share/doc/percona-xtrabackup-24-2.4.6/COPYING
/usr/share/man/man1/innobackupex.1.gz
/usr/share/man/man1/xbcrypt.1.gz
/usr/share/man/man1/xbstream.1.gz
/usr/share/man/man1/xtrabackup.1.gz
`步驟二：innobackupex完整備份、增量備份操作

--host 主機名

--port 3306

--user 用戶名

--password 密碼

--databases="庫名"

--databases="庫1 庫2"

--databases="庫.表"

--no-timestamp 不用日期命名備份文件存儲的子目錄，使用備份的數據庫名做備份目錄名

--no-timestmap 不使用日期命名備份目錄名``
1）做一個完整備份

默認情況下，備份文件存儲的子目錄會用日期命名，

innobackupex作為客戶端工具，以mysql協議連入mysqld，將數據備份到/backup文件夾

[root@dbsvr1 ~]# innobackupex --user=root --password=1234567 /backup/mysql –no-timestamp
170425 11:05:44 innobackupex: Starting the backup operation
IMPORTANT: Please check that the backup run completes successfully.
           At the end of a successful backup run innobackupex
           prints "completed OK!".
Unrecognized character \x01; marked by <-- HERE after <-- HERE near column 1 at - line 1374.
170425 11:05:45 Connecting to MySQL server host: localhost, user: root, password: set, port: not set, socket: not set
Using server version 5.7.17
innobackupex version 2.4.6 based on MySQL server 5.7.13 Linux (x86_64) (revision id: 8ec05b7)
xtrabackup: uses posix_fadvise().
xtrabackup: cd to /var/lib/mysql
xtrabackup: open files limit requested 0, set to 1024
xtrabackup: using the following InnoDB configuration:
xtrabackup:   innodb_data_home_dir = .
xtrabackup:   innodb_data_file_path = ibdata1:12M:autoextend
xtrabackup:   innodb_log_group_home_dir = ./
xtrabackup:   innodb_log_files_in_group = 2
xtrabackup:   innodb_log_file_size = 50331648
InnoDB: Number of pools: 1
170425 11:05:45 >> log scanned up to (2543893)
xtrabackup: Generating a list of tablespaces
InnoDB: Allocated tablespace ID 2 for mysql/plugin, old maximum was 0
170425 11:05:45 [01] Copying ./ibdata1 to /backup/ibdata1
170425 11:05:45 [01]        ...done
170425 11:05:46 [01] Copying ./mysql/plugin.ibd to /backup/mysql/plugin.ibd
170425 11:05:46 [01]        ...done
170425 11:05:46 [01] Copying ./mysql/servers.ibd to /backup/mysql/servers.ibd
170425 11:05:46 [01]        ...done
170425 11:05:46 [01] Copying ./mysql/help_topic.ibd to /backup/mysql/help_topic.ibd
170425 11:05:46 [01]        ...done
170425 11:05:46 >> log scanned up to (2543893)
.. ..
170425 11:06:00 [01] Copying ./sys/x@0024waits_global_by_latency.frm to /backup/sys/x@0024waits_global_by_latency.frm
170425 11:06:00 [01]        ...done
170425 11:06:00 [01] Copying ./sys/session_ssl_status.frm to /backup/sys/session_ssl_status.frm
170425 11:06:00 [01]        ...done
170425 11:06:00 [01] Copying ./db1/db.opt to /backup/db1/db.opt
170425 11:06:00 [01]        ...done
170425 11:06:00 [01] Copying ./db1/tb1.frm to /backup/db1/tb1.frm
170425 11:06:00 [01]        ...done
170425 11:06:00 Finished backing up non-InnoDB tables and files
170425 11:06:00 Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS...
xtrabackup: The latest check point (for incremental): '2543884'
xtrabackup: Stopping log copying thread.
.170425 11:06:00 >> log scanned up to (2543893)
170425 11:06:00 Executing UNLOCK TABLES
170425 11:06:00 All tables unlocked
170425 11:06:00 [00] Copying ib_buffer_pool to /backup/ib_buffer_pool
170425 11:06:00 [00]        ...done
170425 11:06:00 Backup created in directory '/backup/'
170425 11:06:00 [00] Writing backup-my.cnf
170425 11:06:00 [00]        ...done
170425 11:06:00 [00] Writing xtrabackup_info
170425 11:06:00 [00]        ...done
xtrabackup: Transaction log of lsn (2543884) to (2543893) was copied.
170425 11:06:01 completed OK

確認備份好的文件數據

[root@dbsvr1 ~]#ls /backup/
backup-my.cnf  ib_buffer_pool  mysql      sys                   xtrabackup_info
db1  ibdata1      performance_schema  xtrabackup_checkpoints  xtrabackup_logfile

2）做一個增量備份（基于前一步的完整備份）

隨意做一些新增或更改庫表的操作，比如在db1庫中新建一個mytb的表：

mysql> USE db1;
Database changed
mysql> CREATE TABLE mytb(id int(4), name varchar(24));
Query OK, 0 rows affected (0.38 sec)
mysql> INSERT INTO tb1 VALUES
    -> (1,'bon'),
    -> (2,'bo'),
Query OK, 2 rows affected (0.12 sec)
Records: 2  Duplicates: 0  Warnings: 0
mysql> SELECT * FROM tb1;
+------+------+
| id   | name |
+------+------+
|    1 | bob  |
|    2 | bo   |
+------+------+
2 rows in set (0.00 sec)

以前一次保存到/backup的完整備份為基礎，做一個增量備份，保存到/incr01/，指定增量備份參照的基本目錄（完整備份目錄）需要用到選項--incremental-basedir。相關操作如下

[root@dbsvr1 ~]# innobackupex  --user=root --password=12345678 --incremental /incr01 --incremental-basedir=/backup/ --no-timestamp
170425 11:30:14 innobackupex: Starting the backup operation
IMPORTANT: Please check that the backup run completes successfully.
           At the end of a successful backup run innobackupex
           prints "completed OK!".
Unrecognized character \x01; marked by <-- HERE after <-- HERE near column 1 at - line 1374.
170425 11:30:14 Connecting to MySQL server host: localhost, user: root, password: set, port: not set, socket: not set
Using server version 5.7.17
innobackupex version 2.4.6 based on MySQL server 5.7.13 Linux (x86_64) (revision id: 8ec05b7)
incremental backup from 2543884 is enabled.
xtrabackup: uses posix_fadvise().
xtrabackup: cd to /var/lib/mysql
xtrabackup: open files limit requested 0, set to 1024
xtrabackup: using the following InnoDB configuration:
xtrabackup:   innodb_data_home_dir = .
xtrabackup:   innodb_data_file_path = ibdata1:12M:autoextend
xtrabackup:   innodb_log_group_home_dir = ./
xtrabackup:   innodb_log_files_in_group = 2
xtrabackup:   innodb_log_file_size = 50331648
InnoDB: Number of pools: 1
170425 11:30:14 >> log scanned up to (2549933)
xtrabackup: Generating a list of tablespaces
InnoDB: Allocated tablespace ID 2 for mysql/plugin, old maximum was 0
xtrabackup: using the full scan for incremental backup
170425 11:30:15 [01] Copying ./ibdata1 to /incr01/ibdata1.delta
170425 11:30:15 [01]        ...done
170425 11:30:15 >> log scanned up to (2549933)
170425 11:30:15 [01] Copying ./mysql/plugin.ibd to /incr01/mysql/plugin.ibd.delta
170425 11:30:15 [01]        ...done
... ...
170425 11:30:35 Executing UNLOCK TABLES
170425 11:30:35 All tables unlocked
170425 11:30:35 [00] Copying ib_buffer_pool to /incr01/ib_buffer_pool
170425 11:30:35 [00]        ...done
170425 11:30:35 Backup created in directory '/incr01/'
170425 11:30:35 [00] Writing backup-my.cnf
170425 11:30:35 [00]        ...done
170425 11:30:35 [00] Writing xtrabackup_info
170425 11:30:35 [00]        ...done
xtrabackup: Transaction log of lsn (2549924) to (2549933) was copied.
170425 11:30:35 completed OK!

確認備份好的文件數據：
[root@dbsvr1 ~]# ls /incr01/
backup-my.cnf  ib_buffer_pool  ibdata1.meta  performance_schema  xtrabackup_checkpoints  xtrabackup_logfile
db1            ibdata1.delta   mysql         sys
對比完整備份、增量備份的大小：

[root@dbsvr1 ~]# du -sh /backup/ /incr01/
142M    /backup/                              //完整備份的大小
3.5M    /incr01/    
```                          //增量備份的大小
步驟三：恢復數據

通過XtraBackup工具備份的數據庫目錄，若要恢復到另一個MySQL云服務器，需要先做一個“--apply-log --redo-only ”的準備操作。

1）準備恢復“完整備份”

完成準備以后，最終/backup可用來重建MySQL云服務器。這種情況下，需要先做一個“--apply-log --redo-only ”的準備操作，以確保數據一致性：

[root@dbsvr1 ~]#innobackupex  --user=root --password=12345678 --apply-log  --redo-only /backup/
170425 11:42:19 innobackupex: Starting the apply-log operation
IMPORTANT: Please check that the apply-log run completes successfully.
At the end of a successful apply-log run innobackupex
prints "completed OK!".
innobackupex version 2.4.6 based on MySQL server 5.7.13 Linux (x86_64) (revision id: 8ec05b7)
xtrabackup: cd to /backup/
xtrabackup: This target seems to be already prepared.
InnoDB: Number of pools: 1
xtrabackup: notice: xtrabackup_logfile was already used to '--prepare'.
xtrabackup: using the following InnoDB configuration for recovery:
xtrabackup:   innodb_data_home_dir = .
xtrabackup:   innodb_data_file_path = ibdata1:12M:autoextend
xtrabackup:   innodb_log_group_home_dir = .
xtrabackup:   innodb_log_files_in_group = 2
xtrabackup:   innodb_log_file_size = 50331648
xtrabackup: using the following InnoDB configuration for recovery:
xtrabackup:   innodb_data_home_dir = .
xtrabackup:   innodb_data_file_path = ibdata1:12M:autoextend
xtrabackup:   innodb_log_group_home_dir = .
xtrabackup:   innodb_log_files_in_group = 2
xtrabackup:   innodb_log_file_size = 50331648
xtrabackup: Starting InnoDB instance for recovery.
xtrabackup: Using 104857600 bytes for buffer pool (set by --use-memory parameter)
InnoDB: PUNCH HOLE support available
InnoDB: Mutexes and rw_locks use GCC atomic builtins
InnoDB: Uses event mutexes
InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
InnoDB: Compressed tables use zlib 1.2.7
InnoDB: Number of pools: 1
InnoDB: Not using CPU crc32 instructions
InnoDB: Initializing buffer pool, total size = 100M, instances = 1, chunk size = 100M
InnoDB: Completed initialization of buffer pool
InnoDB: page_cleaner coordinator priority: -20
InnoDB: Highest supported file format is Barracuda.
xtrabackup: starting shutdown with innodb_fast_shutdown = 1
InnoDB: Starting shutdown...
InnoDB: Shutdown completed; log sequence number 2544177
InnoDB: Number of pools: 1
170425 11:42:20 completed OK!

準備恢復“增量備份”

[root@dbsvr1 ~]#innobackupex  --user=root --password=12345678 --apply-log  --redo-only /backup/  --incremental-dir=/incr01
170425 11:42:55 innobackupex: Starting the apply-log operation
IMPORTANT: Please check that the apply-log run completes successfully.
At the end of a successful apply-log run innobackupex
prints "completed OK!".
innobackupex version 2.4.6 based on MySQL server 5.7.13 Linux (x86_64) (revision id: 8ec05b7)
incremental backup from 2543884 is enabled.
xtrabackup: cd to /backup/
xtrabackup: This target seems to be already prepared with --apply-log-only.
InnoDB: Number of pools: 1
xtrabackup: xtrabackup_logfile detected: size=8388608, start_lsn=(2549924)
xtrabackup: using the following InnoDB configuration for recovery:
xtrabackup:   innodb_data_home_dir = .
xtrabackup:   innodb_data_file_path = ibdata1:12M:autoextend
xtrabackup:   innodb_log_group_home_dir = /incr01/
xtrabackup:   innodb_log_files_in_group = 1
xtrabackup:   innodb_log_file_size = 8388608
xtrabackup: Generating a list of tablespaces
InnoDB: Allocated tablespace ID 2 for mysql/plugin, old maximum was 0
xtrabackup: page size for /incr01//ibdata1.delta is 16384 bytes
Applying /incr01//ibdata1.delta to ./ibdata1...
... ...
170425 11:43:09 [01] Copying /incr01/performance_schema/global_status.frm to ./performance_schema/global_status.frm
170425 11:43:09 [01]        ...done
170425 11:43:09 [01] Copying /incr01/performance_schema/session_status.frm to ./performance_schema/session_status.frm
170425 11:43:09 [01]        ...done
170425 11:43:09 [00] Copying /incr01//xtrabackup_info to ./xtrabackup_info
170425 11:43:09 [00]        ...done
170425 11:43:10 completed OK!

2）關閉mysql服務，并將/var/lib/mysql/下的文件刪除，假設數據被刪除。

[root@dbsvr1 ~]#systemctl  stop  mysqld
[root@dbsvr1 ~]#rm -rf /var/lib/mysql
3）恢復“完整備份+增量備份”

完成準備以后，最終仍然是/backup用來重建MySQL云服務器，但這種情況下需提前合并相關增量備份的數據

[root@dbsvr1 ~]# innobackupex --user=root --password=12345678 --copy-back  /backup/
... ...
170425 11:51:39 [01] Copying ./performance_schema/global_status.frm to /var/lib/mysql/performance_schema/glo.frm
170425 11:51:39 [01]        ...done
170425 11:51:39 [01] Copying ./performance_schema/session_status.frm to /var/lib/mysql/performance_schema/seus.frm
170425 11:51:39 [01]        ...done
170425 11:51:39 [01] Copying ./ib_buffer_pool to /var/lib/mysql/ib_buffer_pool
170425 11:51:39 [01]        ...done
170425 11:51:39 [01] Copying ./ibtmp1 to /var/lib/mysql/ibtmp1
170425 11:51:39 [01]        ...done
170425 11:51:39 [01] Copying ./xtrabackup_info to /var/lib/mysql/xtrabackup_info
170425 11:51:39 [01]        ...done
170425 11:51:39 completed OK!

4）修改/var/lib/mysql/下文件屬主與屬組,查看數據：

恢復后，/var/lib/mysql下文件屬組與屬主皆為root，需要更改為mysql

root@dbsvr1 ~]#chown -R mysql:mysql /var/lib/mysql
[root@dbsvr1 ~]#systemctl  start mysqld.service
[root@dbsvr1 ~]#mysql -uroot -p12345678 -e "select * from db1.tb1"
mysql: [Warning] Using a password on the command line interface can be insecure.
+------+------+
| id   | name |
+------+------+
|    1 | bob  |
|    2 | bo   |
+------+------+

看完以上關于MySQL備份工具一般有哪些，很多讀者朋友肯定多少有一定的了解，如需獲取更多的行業知識信息 ，可以持續關注我們的行業資訊欄目的。