Summary of the use of MySQL innobackupex backup tool

foreword

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In the process of MySQL backup and building slave databases, we mostly use mysqldump for relatively small databases, which is simple and convenient. But when building a slave library in a large database, and the database host does not have a good storage to meet the backup requirements, you need to use innobackupex to assist you in making a backup, and you can even use it to build a MySQL slave library, which is very Simple.

1. MySQL innobackupex backup and recovery

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1.1 Compress xbsteam to pack and compress for backup and recovery

• backup

  innobackupex --defaults-file=/usr/local/mysql/my.cnf --user=root --stream=xbstream --compress /data/backup/ > /data/backup/full.xbstream
  

• decompress xbstream

  xbstream -x < /data/backup/full.xbstream -C /data/backup_qp/
  

• decompress qp

  innobackupex --decompress /data/backup_qp
  

• delete qp file

  find /data/backup -name "*.qp" | xargs rm
  

Note: If the report cannot find qpress, you need to install it firstqpress

1.2 Backup and restore using tar gzip

• backup

  innobackupex --defaults-file=/usr/local/mysql/my.cnf --user=root --stream=tar /data/backup/ |gzip > /data/backup/full.tar.gz
  

• unzip

  tar -zxvf /data/backup/full.tar.gz -C /data/backup_targz
  

1.3 Backup and restore using tar bzip

• backup

  innobackupex --defaults-file=/usr/local/mysql/my.cnf --user=root --stream=tar /data/backup/ |bzip2 > /data/backup/full.tar.bz2
  

• unzip

  tar -jxvf /data/backup/full.tar.gz -C /data/backup_tarbz
  

The sizes of various backup files are as follows. It is found that the compression method of bz2 is the smallest. There is still a big difference in the space occupied by uncompressed and compressed. It is recommended to use the compressed method.

2. MySQL is built from the library

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2.1, xbsteam way backup, and then manually copy to the remote host

ref: Use innobackupex to build MySQL slave library

2.2, package in xbsteam mode and back up to the remote host through ssh and decompress

• perform backup

  innobackupex --defaults-file=/etc/my.cnf --user=root --password='root' --stream=xbstream /tmp | ssh [email protected] "/app/percona/percona-xtrabackup-2.4.3-Linux-x86_64/bin/xbstream -x -C /data/mysql/data"
  

• If you find that innobackupex has been waiting for FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS, you can kill other connections

  mysql -e "show processlist" | grep -v -i -e root -e id | awk '{printf "kill "$1";"}' | mysql
  

• The log is as follows:

  161219 20:11:21 [00] Streaming xtrabackup_binlog_info
  161219 20:11:21 [00] ...done
  161219 20:11:21 Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS...
  xtrabackup: The latest check point (for incremental): '6499141903477'
  xtrabackup: Stopping log copying thread.
  .161219 20:11:21 >> log scanned up to (6499141993412)
  
  161219 20:11:23 Executing UNLOCK TABLES
  161219 20:11:23 All tables unlocked
  161219 20:11:23 [00] Streaming ib_buffer_pool to
  161219 20:11:23 [00] ...done
  161219 20:11:23 Backup created in directory '/tmp'
  MySQL binlog position: filename 'mysql-bin.001249', position '151576713', GTID of the last change '4d814c80-9dae-11e6-9711-005056bd55e1:1-113121904,
  5f7b59b2-3e74-11e6-aa1d-005056bd55e1:27485200-29545503,
  db6a8610-9b3e-11e6-8730-005056bd2c74:1-221265164'
  161219 20:11:23 [00] Streaming backup-my.cnf
  161219 20:11:23 [00] ...done
  161219 20:11:23 [00] Streaming xtrabackup_info
  161219 20:11:23 [00] ...done
  xtrabackup: Transaction log of lsn (6498376046758) to (6499141993412) was copied.
  161219 20:11:24 completed OK!
  

• Apply redo to the standby database

  innobackupex --apply-log .

Note: If it cannot be found xbsream, you need to specify an absolute path, or configure the environment variable of ssh to let the SSH Server use a custom environment variable-winter.zhang-ChinaUnix Blog

2.3 Pack and compress in xbsteam mode (qpress) back up to a remote host through ssh and decompress

• perform backup

  innobackupex --defaults-file=/etc/my.cnf --user=root --password='root' --stream=xbstream --compress /tmp | ssh [email protected] "/app/percona/percona-xtrabackup-2.4.3-Linux-x86_64/bin/xbstream -x -C /data/mysql/data"
  

• Decompression
  If the xtrabackup version is greater than 2.1.4, you can directly decompress it in this way

  innobackupex --decompress /backup/bk_compress
  

• Apply redo to the standby database

  innobackupex --apply-log .