rman备份的设置参数问题？？？？

在炸老子就跑

format --文件输出格式，
%d--database name,
%s--backup sets sequence number,
%p--backup pieces sequence number
filesperset --每个备份集中所包括的文件数

%u是什么意思？？？？哪为能给我讲一下具体参数情况？

yikaikai

include current controlfile

Creates a snapshot of the current control file and places it into each backup set produced by this clause.
%c Specifies the copy number of the backup piece within a set of duplexed backup pieces.
%p Specifies the backup piece number within the backup set. This value starts at 1 for each backup set and is increased by 1 as each backup piece is  created.
%s Specifies the backup set number. This number is a counter in the control file that is increased for each backup set.
%d Specifies database name.
%n Specifies the database name, padded on the right with x characters to a total length of 8 characters.
%t Specifies the backup set time stamp, which is a 4-byte value derived as the  number of seconds elapsed since a fixed reference time. The combination
of %s and %t can be used to form a unique name for the backup set.
%u Specifies an 8-character name constituted by compressed representations Option Significance of the backup set number and the time that the backup set was created
%U Specifies a convenient shorthand for %u_%p_%c that guarantees  uniqueness in generated backup filenames. If you do not specify a format,  Recovery Manager uses %U by default.


仔细看看书吧, bye, 学习去了