RMAN备份学习笔记
讲到rman就要讲到catalog,也就是恢复目录,这个东东我觉得没有太大的用,如果数据库没有打到open状态,恢复目录数据库根本连接不
讲到rman就要讲到catalog,也就是恢复目录,这个东东我觉得没有太大的用,如果数据库没有打到open状态,恢复目录数据库根本连接不上。我个人建议可以不使用catalog数据库,当然为了全面的了解rman,还是要简单了解下catalog数据库是用来做什么的,catalog数据库是专门供rman使用,用来存储备份信息(不是存储备份文件)及备份脚本的地方。
如果我们不用catalog的时候,备份信息就存放在控制文件当中,这些备份信息是做恢复的时候需要用到的信息。
情景一:使用catalog数据库
1.创建catalog表空间
create tablespace rman_ts
datafile ‘xxxxxxxx/rman_ts01.dbf’
size 10m;
2.创建rman用户
create user rman identified by rman
default tablespace rman_ts
temporary tablespace temp
quota unlimited on rman_ts
3.用户授权
grant recovery_catalog_owner to rman
grant resource,connect to rman
4.在目录数据库中创建恢复目录
rman catalog rman/rman
create catalog tablespace rman_ts
这个时候我们就可以正常使用catalog数据库了,,可以做下测试
[Oracle@ora10 ~]$ rman target / catalog rman/rman
Recovery Manager: Release 10.2.0.4.0 - Production on Thu Mar 28 15:05:06 2013
Copyright (c) 1982, 2007, Oracle. All rights reserved.
connected to target database: QDYX (DBID=3280546065)
connected to recovery catalog database
情景二:不使用恢复目录
rman target /
做个全备份
run {
allocate channel n1 type disk;
allocate channel n2 type disk;
backup as compressed backupset database
format '/disk01/backup/ora10_%d_%s_%p';
release channel n1;
release channel n2;
}
做增量备份(差异增量)
run {
allocate channel c1 type disk;
backup incremental level 0
format '/disk01/backup/rmanbak/inc0_%u_%T'
database;
release channel c1;
}
备份数据文件
backup datafile 8;
备份表空间
backup tablespace users;
备份归档日志
backup archivelog all delete all input;
备份数据库同时备份归档日志,并删除归档日志
backup as compressed backupset database plus archivelog delete all input
format '/disk01/backup/ora10_%d_%s_%p';
注意:这里可以使用run{}生成一段代码,定制一些参数就行备份,也可以直接使用默认参数备份。在备份时如果不指定备份的路径,则默认保存在flash_recovery_area目录下。

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