xtrabackup物理备份

xtrabackup是percona公司的mysql物理备份工具

xtrabackup跟innobackup类似，只是命令有点不一样。备份的动作基本是一模一样

innobackupex：

innobackupex --defaults-file=/etc/my.cnf -uroot -poracle --port=3306 -S/tmp/mysql.sock /data/bak/hotbak

xtrabackup：
xtrabackup --defaults-file=/etc/my.cnf -uroot -poracle -p3306 -S/tmp/mysql.sock --backup --target-dir=/data/bak/xtrabak

[root@lzl 2020-08-13_15-02-58]# xtrabackup --defaults-file=/etc/my.cnf -uroot -poracle -P3306 -S/tmp/mysql.sock --backup --target-dir=/data/bak/xtrabak
xtrabackup: recognized server arguments: --datadir=/data/mysql --log_bin=master-bin --server-id=1001
xtrabackup: recognized client arguments: --user=root --password=* --port=3306 --socket=/tmp/mysql.sock --backup=1 --target-dir=/data/bak/xtrabak
200814 10:16:34 version_check Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_group=xtrabackup;port=3306;mysql_socket=/tmp/mysql.sock' as 'root' (using password: YES).
200814 10:16:35 version_check Connected to MySQL server
200814 10:16:35 version_check Executing a version check against the server...
200814 10:16:35 version_check Done.
200814 10:16:35 Connecting to MySQL server host: localhost, user: root, password: set, port: 3306, socket: /tmp/mysql.sock
Using server version 5.7.20-log
xtrabackup version 2.4.20 based on MySQL server 5.7.26 Linux (x86_64) (revision id: c8b4056)
xtrabackup: uses posix_fadvise().
xtrabackup: cd to /data/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
200814 10:16:35 >> log scanned up to (2687009)
xtrabackup: Generating a list of tablespaces
InnoDB: Allocated tablespace ID 61 for lzldb/tab2, old maximum was 0
200814 10:16:35 [01] Copying ./ibdata1 to /data/bak/xtrabak/ibdata1
200814 10:16:35 [01] ...done
200814 10:16:35 [01] Copying ./lzldb/tab2.ibd to /data/bak/xtrabak/lzldb/tab2.ibd
200814 10:16:35 [01] ...done
200814 10:16:35 [01] Copying ./lzldb/tab1.ibd to /data/bak/xtrabak/lzldb/tab1.ibd
200814 10:16:35 [01] ...done
200814 10:16:35 [01] Copying ./sys/sys_config.ibd to /data/bak/xtrabak/sys/sys_config.ibd
200814 10:16:35 [01] ...done
。。。
200814 10:16:35 [01] ...done
200814 10:16:36 >> log scanned up to (2687009)
200814 10:16:36 Executing FLUSH NO_WRITE_TO_BINLOG TABLES...
200814 10:16:36 Executing FLUSH TABLES WITH READ LOCK...
200814 10:16:36 Starting to backup non-InnoDB tables and files
200814 10:16:36 [01] Copying ./lzldb/tab3.MYI to /data/bak/xtrabak/lzldb/tab3.MYI
200814 10:16:36 [01] ...done
200814 10:16:36 [01] Copying ./lzldb/tab2.frm to /data/bak/xtrabak/lzldb/tab2.frm
200814 10:16:36 [01] ...done
...
200814 10:16:38 [01] Copying ./mysql/event.MYD to /data/bak/xtrabak/mysql/event.MYD
200814 10:16:38 [01] ...done
200814 10:16:38 Finished backing up non-InnoDB tables and files
200814 10:16:38 [00] Writing /data/bak/xtrabak/xtrabackup_binlog_info
200814 10:16:38 [00] ...done
200814 10:16:38 Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS...
xtrabackup: The latest check point (for incremental): '2687000'
xtrabackup: Stopping log copying thread.
.200814 10:16:38 >> log scanned up to (2687009)

200814 10:16:39 Executing UNLOCK TABLES
200814 10:16:39 All tables unlocked
200814 10:16:39 [00] Copying ib_buffer_pool to /data/bak/xtrabak/ib_buffer_pool
200814 10:16:39 [00] ...done
200814 10:16:39 Backup created in directory '/data/bak/xtrabak/'
MySQL binlog position: filename 'master-bin.000009', position '194', GTID of the last change 'a9521767-c5a0-11ea-a743-08002792ac2c:1-6'
200814 10:16:39 [00] Writing /data/bak/xtrabak/backup-my.cnf
200814 10:16:39 [00] ...done
200814 10:16:39 [00] Writing /data/bak/xtrabak/xtrabackup_info
200814 10:16:39 [00] ...done
xtrabackup: Transaction log of lsn (2687000) to (2687009) was copied.
200814 10:16:39 completed OK!

[root@lzl xtrabak]# ls -lrt
total 12336

-rw-r----- 1 root root 12582912 Aug 14 10:16 ibdata1
drwxr-x--- 2 root root 4096 Aug 14 10:16 lzldb
drwxr-x--- 2 root root 4096 Aug 14 10:16 performance_schema
drwxr-x--- 2 root root 12288 Aug 14 10:16 sys
drwxr-x--- 2 root root 4096 Aug 14 10:16 mysql
-rw-r----- 1 root root 63 Aug 14 10:16 xtrabackup_binlog_info
-rw-r----- 1 root root 2560 Aug 14 10:16 xtrabackup_logfile
-rw-r----- 1 root root 135 Aug 14 10:16 xtrabackup_checkpoints
-rw-r----- 1 root root 360 Aug 14 10:16 ib_buffer_pool
-rw-r----- 1 root root 490 Aug 14 10:16 backup-my.cnf
-rw-r----- 1 root root 606 Aug 14 10:16 xtrabackup_info

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