此次資料遷移，需要將資料庫備份到儲存上。由於檔案系統的限制，每個掛載點的lv不能超過2TB。這就需要將資料庫備份到不同掛載點的目錄上，可以採用分配通道中的format關鍵字實現該需求。

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;

}

RMAN將備份片分佈在不同的掛載點

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