RMAN中MAXSETSIZE和MAXPIECESIZE的用法

MAXSETSIZEMAXPIECESIZE用法

区别:maxpiecesize设置的是备份完成后的备份片大小,对备份整体的大小没有影响,比如一个G的备份完成文件,maxpiecesize设置为100M,最后就会变成10100M的备份文件。Maxsetsize设置限定的是整体大小,个人认为这个功能比较鸡肋,一般只要没人动,就用不到的。

Maxsetsize的写法:

1.

RMAN> configure maxsetsize to 2G;

 

RMAN> run{

2> allocate channel c1 device type disk;

3> backup database format='/u01/app/oracle/oradata/Backup/oradb_%d_%s.bak';

4> release channel c1;

5> }

 

2.

run{

allocate channel c1 device type disk ;

backup database maxsetsize 1000M format='/u01/app/oracle/oradata/Backup/oradb_%d_%s_%p.bak';

release channel c1;

}

清除maxsetsize的语句:RMAN> CONFIGURE MAXSETSIZE clear;

Maxpiecesize的写法:

run{

allocate channel c1 device type disk MAXPIECESIZE 100M;

backup database format='/u01/app/oracle/oradata/Backup/oradb_%d_%s_%p.bak';

release channel c1;

}

然后每个文件都是100M

[oracle@orcl Backup]$ ls -lh

total 1.2G

-rw-r----- 1 oracle oinstall 100M Dec 24 03:01 oradb_ORCL_117_10.bak

-rw-r----- 1 oracle oinstall 100M Dec 24 03:01 oradb_ORCL_117_11.bak

-rw-r----- 1 oracle oinstall  71M Dec 24 03:01 oradb_ORCL_117_12.bak

-rw-r----- 1 oracle oinstall 100M Dec 24 02:59 oradb_ORCL_117_1.bak

-rw-r----- 1 oracle oinstall 100M Dec 24 02:59 oradb_ORCL_117_2.bak

-rw-r----- 1 oracle oinstall 100M Dec 24 02:59 oradb_ORCL_117_3.bak

-rw-r----- 1 oracle oinstall 100M Dec 24 03:00 oradb_ORCL_117_4.bak

-rw-r----- 1 oracle oinstall 100M Dec 24 03:00 oradb_ORCL_117_5.bak

-rw-r----- 1 oracle oinstall 100M Dec 24 03:00 oradb_ORCL_117_6.bak

-rw-r----- 1 oracle oinstall 100M Dec 24 03:00 oradb_ORCL_117_7.bak

-rw-r----- 1 oracle oinstall 100M Dec 24 03:00 oradb_ORCL_117_8.bak

-rw-r----- 1 oracle oinstall 100M Dec 24 03:00 oradb_ORCL_117_9.bak

-rw-r----- 1 oracle oinstall 9.7M Dec 24 03:01 oradb_ORCL_118_1.bak

posted @ 2020-01-06 14:37  我爱睡莲  阅读(...)  评论(...编辑  收藏