Xtrabackup for data backup

xtrabackup

XtraBackup(PXB) The tool is Percona Company use perl One of the tools of language development is for MySQL Backup tool for physical hot backup of database , Support MySQl（Oracle）、Percona Server and MariaDB, And all open source , It's the conscience of the industry . Ali's RDS MySQL Physical backup is based on this tool . Because it is backed up by physical copy , So it's very fast , Dozens of G The data is done in a few minutes , And it cleverly uses mysql Features to achieve online hot backup , You don't have to shut down the database like you used to do a physical backup , The full backup and incremental backup of the whole database or part of the database can be completed directly online .

install

1. Installation warehouse Install the Percona repository
   yum install http://www.percona.com/downloads/percona-release/redhat/0.1-6/percona-release-0.1-6.noarch.rpm

2. Test whether the warehouse contains the latest version of resources
   yum list | grep percona

3. install packages
   yum install percona-xtrabackup-24

The data backup

1. Full volume backup
   innobackupex ----defaults-file=/etc/my.cnf --user=root --password=root /root/back

Data recovery

1. Shut down the database service
   service mysql stop

2. Execute the data recovery command *( Be careful my.cnf Internally configured datadir Directory must be an empty directory , So before restoring data , First datadir To another directory , Then create an empty directory and perform the recovery )
   innobackupex --defaults-file=/etc/my.cnf --copy-back --rsync /path/to/backup

3. Change permissions for the newly created directory
   chown -R mysql. /app/mysql/data

4. start-up mysql service
   service mysql start