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http://docs.oracle.com/cd/E11882_01/backup.112/e10643/rcmsynta020.htm#RCMRF126
数据文件求不在对应的路径下,实际文件会采用OMF来管理;这时需要使用:
1》RMAN catalog 和 switch database to copy
2》alter database rename file to 和
3》switch datafile file# to copy 来修正控制文件的信息;
对于redolog 如果没有设置DB_RECOVERY_FILE_DEST, or DB_CREATE_ONLINE_LOG_DEST_n. 则会使用DB_CREATE_FILE_DEST 参数指定的目录来存放
SQL> show parameter DB_CREATE_ONLINE_LOG_DEST
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_create_online_log_dest_1 string
db_create_online_log_dest_2 string
db_create_online_log_dest_3 string
db_create_online_log_dest_4 string
db_create_online_log_dest_5 string
若单独指定 db_create_online_log_dest_* 参数,则redolog member 会冗余放到这些单独指定的目录下
Supported options for naming online redo logs duplicated from Oracle-managed files are DB_CREATE_FILE_DEST,DB_RECOVERY_FILE_DEST, or DB_CREATE_ONLINE_LOG_DEST_n.
----DB_CREATE_ONLINE_LOG_DEST_n 参数解释,为redolog,control file指定存放目录,指定多个则多路复用
DB_CREATE_ONLINE_LOG_DEST_n (where n = 1, 2, 3, ... 5) specifies the default location for Oracle-managed control files and online redo logs. If more than one DB_CREATE_ONLINE_LOG_DEST_n parameter is specified,
then the control file or online redo log is multiplexed across the locations of the other DB_CREATE_ONLINE_LOG_DEST_n parameters. One member of each online redo log is created in each location, and one control file is created in each location.
Specifying at least two parameters provides greater fault tolerance for the control files and online redo logs if one of the locations should fail.
If a file system directory is specified as the default location, then the directory must already exist; Oracle does not create it. The directory must have appropriate permissions that allow Oracle to create files in it. Oracle generates unique names for the
files, and a file thus created is an Oracle Managed File.
对于文件系统而言,指定的目录必须权限准确,且已经存在;如果没有,oracle 不会自动创建
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关于rman duplicate 一些比较重要的知识点--系列三
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原文地址:http://blog.csdn.net/lixora/article/details/46866793