RMAN中的%T,%D,%U是什么意思

例如；backup incremental level 0 database format='lev0_%d_%t_%u_%s_%p'

format=string文件路径和名称的格式串，其中的含义是：

%c copy ID

%p backup piece ID

%s backup set ID

%e log Sequence

%h log thread ID

%d database name

%n database name(x填充到8个字符)

%I DBID

%f file ID

%F DBID , day ,month ,year and sequence的复合格式  ---多用于全备份

%N tablespace name    ---表空间备份

%t timestamp

%M mh mm格式

%Y year yyyy格式

%D day dd格式

%u backup set+time(x填充到8个字符))

%U %u_%p_%c    ---- 采用备份冗余时使用

%% %

The format specifier %U is replaced with unique filenames for the files when you take backups.

the %F element of the format string combines the DBID, day, month, year, and sequence number to generate a unique filename. %F must be included in any control file autobackup format.