xtrabackup增量备份恢复步骤

Posted 2022-02-01 Demonson

官网

https://www.percona.com/doc/percona-xtrabackup/2.4/backup_scenarios/incremental_backup.html

备份目录

/data/backups/base  --基础备份
/data/backups/inc1  --一级增量备份
/data/backups/inc2  --二级增量备份

备份

$ xtrabackup --backup --target-dir=/data/backups/base

backup_type = full-backuped
from_lsn = 0
to_lsn = 1626007
last_lsn = 1626007
compact = 0
recover_binlog_info = 1

$ xtrabackup --backup --target-dir=/data/backups/inc1 --incremental-basedir=/data/backups/base

backup_type = incremental
from_lsn = 1626007
to_lsn = 4124244
last_lsn = 4124244
compact = 0
recover_binlog_info = 1

$ xtrabackup --backup --target-dir=/data/backups/inc2 --incremental-basedir=/data/backups/inc1

backup_type = incremental
from_lsn = 4124244
to_lsn = 6938371
last_lsn = 7110572
compact = 0
recover_binlog_info = 1

恢复

$ xtrabackup --prepare --apply-log-only --target-dir=/data/backups/base

InnoDB: Shutdown completed; log sequence number 1626007
161011 12:41:04 completed OK!

$ xtrabackup --prepare --apply-log-only --target-dir=/data/backups/base --incremental-dir=/data/backups/inc1

incremental backup from 1626007 is enabled.
xtrabackup: cd to /data/backups/base
xtrabackup: This target seems to be already prepared with --apply-log-only.
xtrabackup: xtrabackup_logfile detected: size=2097152, start_lsn=(4124244)
...
xtrabackup: page size for /tmp/backups/inc1/ibdata1.delta is 16384 bytes
Applying /tmp/backups/inc1/ibdata1.delta to ./ibdata1...
...
161011 12:45:56 completed OK!

$ xtrabackup --prepare --target-dir=/data/backups/base --incremental-dir=/data/backups/inc2

$ xtrabackup --copy-back --target-dir=/data/backups/base