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[MySQL] INNODB 热备工具试验与总结

数据库 数据库 发布于:2021-07-05 09:57 | 阅读数:302 | 评论:0

  INNODB HOT BACKUP是一个商用的可执行文件。不过可以申请30天试用下。
  相比MYSQL自身的MYSQLDUMP 导入导出工具来说有以下优点:
  1.物理备份。
  2.还原速度快。
  MYSQLDUMP在并发小的时候还可以用下。缺点如下:
  1.逻辑备份。
  2.还原速度慢。
  LVM则可以喝INNODB HOT BACKUP有一拼了,不过有个缺点,就是要建立逻辑卷,而且备份的时候必须得建立跟源数据所在卷一样的临时卷。其他的优点和INNODB HOT BACKUP一样。
  不过INNODB HOT BACKUP的缺点也是有的,就是只备份INNODB的表空间以及生成新的REDO 日志。
  对于表结构的备份可以直接用MYSQLDUMP来个快速逻辑备份, 或者可以用 INNODB 官方给的开源PERL 脚本来配合备份表结构。
  
  INNODB HOT BACKUP 工具需要的两个配置文件示例可以按照官方文档来设置。
  
  
  

  备份目录下的几个文件。
  [root@mysql01 backup]# ls
  backup.cnf  log  my.cnf
  开始备份,关于具体这两个配置文件是干嘛的,我就不说了,具体看看官方手册。
  [root@mysql01 backup]# /root/ibbackup my.cnf backup.cnf
  InnoDB Hot Backup version 3.0.0; Copyright 2002-2005 Innobase Oy
  License A15436 is granted to actionsky (david.yang@actionsky.com)
  (--apply-log works in any computer regardless of the hostname)
  Licensed for use in a computer whose hostname is 'mysql01'
  Expires 2009-6-1 (year-month-day) at 00:00
  See http://www.innodb.com for further information
  Type ibbackup --license for detailed license terms, --help for help
  Contents of my.cnf:
  innodb_data_home_dir got value /var/lib/mysql/data
  innodb_data_file_path got value ibdata1:10M:autoextend
  datadir got value /var/lib/mysql/data
  innodb_log_group_home_dir got value /var/lib/mysql/binlog
  innodb_log_files_in_group got value 3
  innodb_log_file_size got value 10485760
  Contents of backup.cnf:
  innodb_data_home_dir got value /var/lib/mysql/backup
  innodb_data_file_path got value ibdata1:10M:autoextend
  datadir got value /var/lib/mysql/backup
  innodb_log_group_home_dir got value /var/lib/mysql/backup
  innodb_log_files_in_group got value 3
  innodb_log_file_size got value 10485760
  ibbackup: Found checkpoint at lsn 0 79531539
  ibbackup: Starting log scan from lsn 0 79531520
  090416 11:50:02  ibbackup: Copying log...
  090416 11:50:02  ibbackup: Log copied, lsn 0 79531539
  ibbackup: We wait 1 second before starting copying the data files...
  090416 11:50:03  ibbackup: Copying /var/lib/mysql/data/ibdata1
  ibbackup: A copied database page was modified at 0 79531539
  ibbackup: Scanned log up to lsn 0 79531539
  ibbackup: Was able to parse the log up to lsn 0 79531539
  ibbackup: Maximum page number for a log record 0
  090416 11:50:05  ibbackup: Full backup completed!
  开始生成还原数据, 以前还原都是用--restore选项,不过这个选项在以后的版本会被干掉。
  新版本都是用 --apply-log 来产生新的LOG文件。
  [root@mysql01 backup]# /root/ibbackup --apply-log backup.cnf
  InnoDB Hot Backup version 3.0.0; Copyright 2002-2005 Innobase Oy
  License A15436 is granted to actionsky (david.yang@actionsky.com)
  (--apply-log works in any computer regardless of the hostname)
  Licensed for use in a computer whose hostname is 'mysql01'
  Expires 2009-6-1 (year-month-day) at 00:00
  See http://www.innodb.com for further information
  Type ibbackup --license for detailed license terms, --help for help
  Contents of backup.cnf:
  innodb_data_home_dir got value /var/lib/mysql/backup
  innodb_data_file_path got value ibdata1:10M:autoextend
  datadir got value /var/lib/mysql/backup
  innodb_log_group_home_dir got value /var/lib/mysql/backup
  innodb_log_files_in_group got value 3
  innodb_log_file_size got value 10485760
  090416 11:50:11  ibbackup: ibbackup_logfile's creation parameters:
  ibbackup: start lsn 0 79531520, end lsn 0 79531539,
  ibbackup: start checkpoint 0 79531539
  InnoDB: Doing recovery: scanned up to log sequence number 0 79531539
  InnoDB: Starting an apply batch of log records to the database...
  InnoDB: Progress in percents: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 Setting log file size to 0 10485760
  Setting log file size to 0 10485760
  Setting log file size to 0 10485760
  ibbackup: We were able to parse ibbackup_logfile up to
  ibbackup: lsn 0 79531539
  ibbackup: Last MySQL binlog file position 0 249, file name /var/lib/mysql/binlog/mysql.000016
  ibbackup: The first data file is '/var/lib/mysql/backup/ibdata1'
  ibbackup: and the new created log files are at '/var/lib/mysql/backup/'
  090416 11:50:12  ibbackup: Full backup prepared for recovery successfully!
  现在目录下有IBDATA以及新的IB_LOG了。
  [root@mysql01 backup]# ls -l
  total 73840
  -rw-r--r-- 1 mysql mysql      219 Apr 16 01:10 backup.cnf
  -rw-r----- 1 root  root      1024 Apr 16 11:50 ibbackup_logfile
  -rw-r----- 1 root  root  44040192 Apr 16 11:50 ibdata1
  -rw-r----- 1 root  root  10485760 Apr 16 11:50 ib_logfile0
  -rw-r----- 1 root  root  10485760 Apr 16 11:50 ib_logfile1
  -rw-r----- 1 root  root  10485760 Apr 16 11:50 ib_logfile2
  -rw-r--r-- 1 mysql mysql     3608 Apr 16 11:51 log
  -rw-r--r-- 1 mysql mysql      215 Apr 16 01:10 my.cnf
  [root@mysql01 backup]#
  整个的还原过程是:(笨办法)
   1.先停掉MYSQLD
  2.COPY这些文件到现网的MySQL数据以及日志目录。
  3.再次启动MYSQLD
  
  自己写脚本实现自动化,不过这脚本我就不贴了。
  
  

  
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