此次数据迁移，需要将数据库备份到存储上。由于文件系统的限制，每个挂载点的lv不能超过2TB。这就需要将数据库备份到不同挂载点的目录上，可以采用分配通道中的format关键字实现该需求。

run{

allocate channel c1 device type disk format '/orabak1/bj_db_full_%U' maxpiecesize=20G;

allocate channel c2 device type disk format '/orabak2/bj_db_full_%U' maxpiecesize=20G;

allocate channel c3 device type disk format '/orabak3/bj_db_full_%U' maxpiecesize=20G;

allocate channel c4 device type disk format '/orabak4/bj_db_full_%U' maxpiecesize=20G;

allocate channel c5 device type disk format '/orabak5/bj_db_full_%U' maxpiecesize=20G;

allocate channel c6 device type disk format '/orabak6/bj_db_full_%U' maxpiecesize=20G;

allocate channel c7 device type disk format '/orabak7/bj_db_full_%U' maxpiecesize=20G;

allocate channel c8 device type disk format '/orabak8/bj_db_full_%U' maxpiecesize=20G;

backup tag 'BJ_DB_FULL' as compressed backupset database

include current controlfile;

release channel c1;

release channel c2;

release channel c3;

release channel c4;

release channel c5;

release channel c6;

release channel c7;

release channel c8;

}

ITPub博客

RMAN将备份片分布在不同的挂载点