使用 tar -g 参数进行增量备份实验

完整备份:

#执行完整备份
tar -g snapshot -zcf back.tar.gz back

#查看 tarball 内容
[huzi@mail ~]$ tar ztf back.tar.gz
back/
back/readme.txt
back/rmmysql_back.sh
back/mysqlbackup.sh
back/tuning-primer.sh
back/iptables.sh
back/backup.sh
back/MYSQL_BACKUP.sh
back/read.sh
back/backup.sh.bak
back/iptables

增量备份:

#新增一个档案

cp MySQLBackup.log back

#执行第一次的增量备份 (注意 tarball 档名)
tar -g snapshot -zcf back_incremental_1.tar.gz back

#查看 tarball 内容

[huzi@mail ~]$ tar ztf back_incremental_1.tar.gz
back/
back/MySQLBackup.log

#执行第二次的增量备份 (注意 tarball 档名)
tar -g snapshot -zcf backup_incremental_2.tar.gz back

#查看 tarball 内容

[huzi@mail ~]$ tar ztf back_incremental_2.tar.gz
back/
back/iptables

还原备份资料:

#清空测试资料
rm -rf test

#开始进行资料还原
tar zxf backup_full.tar.gz
tar zxf backup_incremental_1.tar.gz
tar zxf backup_incremental_2.tar.gz

#查看测试资料

[huzi@mail ~]$ tar zxvf back.tar.gz
back/
back/MYSQL_BACKUP.sh
back/backup.sh
back/backup.sh.bak
back/iptables.sh
back/mysqlbackup.sh
back/read.sh
back/readme.txt
back/rmmysql_back.sh
back/tuning-primer.sh
[huzi@mail ~]$ tar zxvf back_incremental_1.tar.gz
back/
back/MySQLBackup.log
[huzi@mail ~]$ tar zxvf back_incremental_2.tar.gz
back/
back/iptables
[huzi@mail ~]$ ls back
backup.sh      iptables.sh      MYSQL_BACKUP.sh rmmysql_back.sh
backup.sh.bak MySQLBackup.log readme.txt       tuning-primer.sh
iptables       mysqlbackup.sh   read.sh

使用 tar -u 参数进行增量备份

第一次备份:

#备份资料
tar czvf back.tar.gz back

#查看 tarball 内容
[huzi@mail ~]$ tar ztf back.tar.gz
back/
back/readme.txt
back/rmmysql_back.sh
back/mysqlbackup.sh
back/tuning-primer.sh
back/iptables.sh
back/backup.sh
back/MYSQL_BACKUP.sh
back/read.sh
back/backup.sh.bak
back/iptables

增量备份:

#新增一个档案, 并异动一个档案内容
cp MySQLBackup.log back

#执行增量备份 (-u 参数只能执行於未压缩的 tarball)
gunzip backup.tar.gz
tar uf backup.tar back
gzip backup.tar

#查看 tarball 内容
tar ztf backup.tar.gz

[huzi@mail ~]$ tar ztf back.tar.gz
back/
back/readme.txt
back/rmmysql_back.sh
back/mysqlbackup.sh
back/tuning-primer.sh
back/iptables.sh
back/backup.sh
back/MYSQL_BACKUP.sh
back/read.sh
back/backup.sh.bak
back/iptables
back/
back/MySQLBackup.log
[huzi@mail ~]$

还原备份资料:

#解包 tarball
tar zxf backup.tar.gz