全备信息：20190921
[root@yunapp1 ~]# vi /backup/full/2019-09-21_00-00-01/xtrabackup_info
uuid = c8e0b91f-dbbf-11e9-b52d-00163e0c9fde
name =
tool_name = innobackupex
tool_command = --defaults-file=/etc/my.cnf --use-memory=4G --host=localhost --user=root --password=... --port=3306 --socket=/var/lib/mysql/mysql.sock /backup/full
tool_version = 2.4.11
ibbackup_version = 2.4.11
server_version = 5.7.20-log
start_time = 2019-09-21 00:00:01
end_time = 2019-09-21 00:00:36
lock_time = 0
binlog_pos = filename 'mysql-bin.000012', position '80031677'
innodb_from_lsn = 0
innodb_to_lsn = 1790193547
partial = N
incremental = N
format = file
compact = N
compressed = N
encrypted = N
增量信息：20190922
[root@yunapp1 ~]# cat /backup/incre/2019-09-21_00-00-01/2019-09-22_00-00-02/xtrabackup_info
uuid = f4b6db53-dc88-11e9-b52d-00163e0c9fde
name =
tool_name = innobackupex
tool_command = --defaults-file=/etc/my.cnf --use-memory=4G --host=localhost --user=root --password=... --port=3306 --socket=/var/lib/mysql/mysql.sock --incremental /backup/incre/2019-09-21_00-00-01 --incremental-basedir /backup/full/2019-09-21_00-00-01
tool_version = 2.4.11
ibbackup_version = 2.4.11
server_version = 5.7.20-log
start_time = 2019-09-22 00:00:02
end_time = 2019-09-22 00:00:39
lock_time = 0
binlog_pos = filename 'mysql-bin.000012', position '81275716'
innodb_from_lsn = 1790193547
innodb_to_lsn = 1791339258
partial = N
incremental = Y
format = file
compact = N
compressed = N
encrypted = N
[root@yunapp1 ~]# vi /backup/incre/2019-09-21_00-00-01/2019-09-22_00-00-02/xtrabackup_checkpoints
backup_type = incremental
from_lsn = 1790193547
to_lsn = 1791339258
last_lsn = 1791339267
compact = 0
recover_binlog_info = 0
[root@yunapp1 ~]# vi /backup/incre/2019-09-21_00-00-01/2019-09-22_00-00-02/xtrabackup_binlog_info
mysql-bin.000012 81275716
增量：20190923
[root@yunapp1 ~]# cat /backup/incre/2019-09-21_00-00-01/2019-09-23_00-00-01/xtrabackup_info
uuid = 1e1957b8-dd52-11e9-b52d-00163e0c9fde
name =
tool_name = innobackupex
tool_command = --defaults-file=/etc/my.cnf --use-memory=4G --host=localhost --user=root --password=... --port=3306 --socket=/var/lib/mysql/mysql.sock --incremental /backup/incre/2019-09-21_00-00-01 --incremental-basedir /backup/incre/2019-09-21_00-00-01/2019-09-22_00-00-02
tool_version = 2.4.11
ibbackup_version = 2.4.11
server_version = 5.7.20-log
start_time = 2019-09-23 00:00:01
end_time = 2019-09-23 00:00:37
lock_time = 0
binlog_pos = filename 'mysql-bin.000012', position '82594049'
innodb_from_lsn = 1791339258
innodb_to_lsn = 1792446362
partial = N
incremental = Y
format = file
compact = N
compressed = N
encrypted = N
增量：20190924
[root@yunapp1 ~]# cat /backup/incre/2019-09-21_00-00-01/2019-09-23_10-24-42/xtrabackup_info
uuid = 60b0fa0f-dda9-11e9-b52d-00163e0c9fde
name =
tool_name = innobackupex
tool_command = --defaults-file=/etc/my.cnf --use-memory=4G --host=localhost --user=root --password=... --port=3306 --socket=/var/lib/mysql/mysql.sock --incremental /backup/incre/2019-09-21_00-00-01 --incremental-basedir /backup/incre/2019-09-21_00-00-01/2019-09-23_00-00-01
tool_version = 2.4.11
ibbackup_version = 2.4.11
server_version = 5.7.20-log
start_time = 2019-09-23 10:24:42
end_time = 2019-09-23 10:25:15
lock_time = 0
binlog_pos = filename 'mysql-bin.000012', position '82828586'
innodb_from_lsn = 1792446362
innodb_to_lsn = 1792682857
partial = N
incremental = Y
format = file
compact = N
compressed = N
encrypted = N
说明个问题：xtrabackup每次增量备份都是以上次增量为基础,比如全备innodb_to_lsn = 1790193547，第一次增量innodb_from_lsn = 1790193547，innodb_to_lsninnodb_to_lsn = 1791339258。
