客户说带库上抓小文件会导致带库紧张。
大部分的备份软件都会用filesperset参数来做备份，这样恢复速度快，而且也有利于带库重复删除。
客户用的plus archivelog的形式，一条命令的做全备，现在就有filesperset不区分dbf和arc的情况，反而影响了恢复的效率。
我看了下官方手册，发现backupOperand和backupSpecOperand都有filesperset的设置
那就整个活
备份前的日志情况
[oracle@oracle11g ~]$ ls -l /data/oracle/flash_recovery_area/ORCL/archivelog/2023_08_29/
total 14564
-rw-r----- 1 oracle dba 14885888 Aug 29 16:38 o1_mf_1_503_lgvcnns7_.arc
-rw-r----- 1 oracle dba 1024 Aug 29 16:38 o1_mf_1_504_lgvcno54_.arc
-rw-r----- 1 oracle dba 3584 Aug 29 16:38 o1_mf_1_505_lgvcnpn0_.arc
-rw-r----- 1 oracle dba 1024 Aug 29 16:38 o1_mf_1_506_lgvcnpnj_.arc
-rw-r----- 1 oracle dba 1024 Aug 29 16:38 o1_mf_1_507_lgvcnwl0_.arc
-rw-r----- 1 oracle dba 1024 Aug 29 16:38 o1_mf_1_508_lgvcnwlf_.arc
-rw-r----- 1 oracle dba 1024 Aug 29 16:38 o1_mf_1_509_lgvcnzlx_.arc备份命令及日志
[oracle@oracle11g ~]$ rman target /
Recovery Manager: Release 11.2.0.1.0 - Production on Tue Aug 29 16:39:51 2023
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database: ORCL (DBID=1659508461)
RMAN>
RMAN>
RMAN> backup full database filesperset 1 format '/home/oracle/db_%U.dbf' plus archivelog filesperset 64 format '/home/oracle/arc_%U.dbf';
Starting backup at 29-AUG-23
current log archived
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=70 device type=DISK
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=503 RECID=1 STAMP=1146155925
input archived log thread=1 sequence=504 RECID=2 STAMP=1146155925
input archived log thread=1 sequence=505 RECID=3 STAMP=1146155926
input archived log thread=1 sequence=506 RECID=4 STAMP=1146155926
input archived log thread=1 sequence=507 RECID=5 STAMP=1146155932
input archived log thread=1 sequence=508 RECID=6 STAMP=1146155932
input archived log thread=1 sequence=509 RECID=7 STAMP=1146155935
input archived log thread=1 sequence=510 RECID=8 STAMP=1146156058
channel ORA_DISK_1: starting piece 1 at 29-AUG-23
channel ORA_DISK_1: finished piece 1 at 29-AUG-23
piece handle=/home/oracle/arc_0h251t0r_1_1��.dbf tag=TAG20230829T164059 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 29-AUG-23
Starting backup at 29-AUG-23
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00002 name=/data/oracle/orcl/sysaux01.dbf
channel ORA_DISK_1: starting piece 1 at 29-AUG-23
channel ORA_DISK_1: finished piece 1 at 29-AUG-23
piece handle=/home/oracle/db_0i251t0s_1_1.dbf tag=TAG20230829T164100 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=/data/oracle/orcl/system01.dbf
channel ORA_DISK_1: starting piece 1 at 29-AUG-23
channel ORA_DISK_1: finished piece 1 at 29-AUG-23
piece handle=/home/oracle/db_0j251t13_1_1.dbf tag=TAG20230829T164100 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00005 name=/home/oracle/rel1.dbf
channel ORA_DISK_1: starting piece 1 at 29-AUG-23
channel ORA_DISK_1: finished piece 1 at 29-AUG-23
piece handle=/home/oracle/db_0k251t1a_1_1.dbf tag=TAG20230829T164100 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00008 name=/home/oracle/tmp.dbf
channel ORA_DISK_1: starting piece 1 at 29-AUG-23
channel ORA_DISK_1: finished piece 1 at 29-AUG-23
piece handle=/home/oracle/db_0l251t1c_1_1.dbf tag=TAG20230829T164100 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00003 name=/data/oracle/orcl/undotbs01.dbf
channel ORA_DISK_1: starting piece 1 at 29-AUG-23
channel ORA_DISK_1: finished piece 1 at 29-AUG-23
piece handle=/home/oracle/db_0m251t1d_1_1.dbf tag=TAG20230829T164100 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
channel ORA_DISK_1: starting piece 1 at 29-AUG-23
channel ORA_DISK_1: finished piece 1 at 29-AUG-23
piece handle=/home/oracle/db_0n251t1e_1_1.dbf tag=TAG20230829T164100 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00004 name=/data/oracle/orcl/users01.dbf
channel ORA_DISK_1: starting piece 1 at 29-AUG-23
channel ORA_DISK_1: finished piece 1 at 29-AUG-23
piece handle=/home/oracle/db_0o251t1g_1_1.dbf tag=TAG20230829T164100 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current SPFILE in backup set
channel ORA_DISK_1: starting piece 1 at 29-AUG-23
channel ORA_DISK_1: finished piece 1 at 29-AUG-23
piece handle=/home/oracle/db_0p251t1h_1_1.dbf tag=TAG20230829T164100 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 29-AUG-23
Starting backup at 29-AUG-23
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=511 RECID=9 STAMP=1146156082
channel ORA_DISK_1: starting piece 1 at 29-AUG-23
channel ORA_DISK_1: finished piece 1 at 29-AUG-23
piece handle=/home/oracle/arc_0q251t1i_1_1��.dbf tag=TAG20230829T164122 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 29-AUG-23
RMAN>
RMAN> exit备份文件情况
[oracle@oracle11g ~]$ ls -ltr
total 1500204
drwxr-x--- 3 oracle dba 18 Mar 17 16:27 oradiag_oracle
-rw-r--r-- 1 oracle dba 109 Apr 25 22:38 sales.lst
-rwxrwxrwx 1 root root 5332 Apr 25 22:42 csv.sql
-rw-r--r-- 1 oracle dba 1215 Apr 25 22:43 csv.tmp
-rw-r--r-- 1 oracle dba 1226 Apr 25 22:43 SALGRADE.lst
-rw-r--r-- 1 oracle dba 1562 Apr 25 22:45 SALGRADE.log
-rw-r--r-- 1 oracle dba 7878 Apr 26 23:55 sample-oracle.sql
-rw-r--r-- 1 oracle dba 186 Jun 20 16:32 txt
-rw-r----- 1 oracle dba 1097728 Jun 20 16:34 20230620_081v6lvv_1_1.dbf
-rw-r--r-- 1 oracle dba 4748 Aug 25 14:55 move.sql
-rw-r--r-- 1 oracle dba 6178 Aug 25 15:12 pl.sql
-rw-r--r-- 1 oracle dba 6202 Aug 25 15:13 pl2.sql
-rw-r--r-- 1 oracle dba 6220 Aug 25 15:15 pl3.sql
-rw-r--r-- 1 oracle dba 6173 Aug 25 15:31 release_dbf.sql
-rw-r----- 1 oracle dba 14894080 Aug 29 16:40 arc_0h251t0r_1_1??.dbf
-rw-r----- 1 oracle dba 646946816 Aug 29 16:41 db_0i251t0s_1_1.dbf
-rw-r----- 1 oracle dba 630808576 Aug 29 16:41 db_0j251t13_1_1.dbf
-rw-r----- 1 oracle dba 1089536 Aug 29 16:41 db_0k251t1a_1_1.dbf
-rw-r----- 1 oracle dba 17178624 Aug 29 16:41 db_0l251t1c_1_1.dbf
-rw-r----- 1 oracle dba 2367488 Aug 29 16:41 db_0m251t1d_1_1.dbf
-rw-r----- 1 oracle dba 9797632 Aug 29 16:41 db_0n251t1e_1_1.dbf
-rw-r----- 1 oracle dba 2113536 Aug 29 16:41 db_0o251t1g_1_1.dbf
-rw-r----- 1 oracle dba 98304 Aug 29 16:41 db_0p251t1h_1_1.dbf
-rw-r----- 1 oracle dba 104865792 Aug 29 16:41 rel1.dbf
-rw-r----- 1 oracle dba 104865792 Aug 29 16:41 tmp.dbf
-rw-r----- 1 oracle dba 3072 Aug 29 16:41 arc_0q251t1i_1_1??.dbf总结：可行，可以分开指定。
backup full database filesperset 1 format '/home/oracle/db_%U.dbf' plus archivelog filesperset 64 format '/home/oracle/arc_%U.dbf';
