[20161212]备份archivelog.txt

冷不防 2022-01-31 15:55 113阅读 0赞

\[20161212\]备份archivelog.txt

\--许多人都知道如果执行backup database plus archivelog;实际上是先执行如下:

1.alter system archive log current ;  
2.备份archivelog;  
3.备份数据库  
4.alter system archive log current ;  
5.备份剩下的archivelog备份.

自己测试看看:  
1.环境:  
SYS@book> @ &r/ver1

PORT\_STRING                    VERSION        BANNER  
\------------------------------ -------------- --------------------------------------------------------------------------------  
x86\_64/Linux 2.4.xx            11.2.0.4.0     Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

SYS@book> archive log list  
Database log mode              Archive Mode  
Automatic archival             Enabled  
Archive destination            /u01/app/oracle/archivelog/book  
Oldest online log sequence     9  
Next log sequence to archive   11  
Current log sequence           11

\--当前Current log sequence=11.

2.备份测试:

RMAN> backup database plus archivelog ;  
Starting backup at 2016-12-12 09:58:07  
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=6 RECID=2 STAMP=930387718  
input archived log thread=1 sequence=7 RECID=3 STAMP=930389216  
input archived log thread=1 sequence=8 RECID=4 STAMP=930389273  
input archived log thread=1 sequence=9 RECID=5 STAMP=930389284  
input archived log thread=1 sequence=10 RECID=6 STAMP=930390958  
input archived log thread=1 sequence=11 RECID=7 STAMP=930391087  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<=说明先做了一次切换.alter system archive log current ;并且先备份archivelog.  
channel ORA\_DISK\_1: starting piece 1 at 2016-12-12 09:58:07  
channel ORA\_DISK\_1: finished piece 1 at 2016-12-12 09:58:08  
piece handle=/u01/app/oracle/fast\_recovery\_area/BOOK/backupset/2016\_12\_12/o1\_mf\_annnn\_TAG20161212T095807\_d4w11hf9\_.bkp tag=TAG20161212T095807 comment=NONE  
channel ORA\_DISK\_1: backup set complete, elapsed time: 00:00:01  
Finished backup at 2016-12-12 09:58:08

Starting backup at 2016-12-12 09:58:08  
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=00001 name=/mnt/ramdisk/book/system01.dbf  
input datafile file number=00002 name=/mnt/ramdisk/book/sysaux01.dbf  
input datafile file number=00005 name=/mnt/ramdisk/book/example01.dbf  
input datafile file number=00003 name=/mnt/ramdisk/book/undotbs01.dbf  
input datafile file number=00004 name=/mnt/ramdisk/book/users01.dbf  
channel ORA\_DISK\_1: starting piece 1 at 2016-12-12 09:58:08  
channel ORA\_DISK\_1: finished piece 1 at 2016-12-12 09:58:15  
piece handle=/u01/app/oracle/fast\_recovery\_area/BOOK/backupset/2016\_12\_12/o1\_mf\_nnndf\_TAG20161212T095808\_d4w11jno\_.bkp tag=TAG20161212T095808 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  
including current control file in backup set  
including current SPFILE in backup set  
channel ORA\_DISK\_1: starting piece 1 at 2016-12-12 09:58:16  
channel ORA\_DISK\_1: finished piece 1 at 2016-12-12 09:58:17  
piece handle=/u01/app/oracle/fast\_recovery\_area/BOOK/backupset/2016\_12\_12/o1\_mf\_ncsnf\_TAG20161212T095808\_d4w11rsb\_.bkp tag=TAG20161212T095808 comment=NONE  
channel ORA\_DISK\_1: backup set complete, elapsed time: 00:00:01  
Finished backup at 2016-12-12 09:58:17

Starting backup at 2016-12-12 09:58:17  
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=12 RECID=8 STAMP=930391097  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<=又做了1次切换,备份剩下的archivelog.  
channel ORA\_DISK\_1: starting piece 1 at 2016-12-12 09:58:17  
channel ORA\_DISK\_1: finished piece 1 at 2016-12-12 09:58:18  
piece handle=/u01/app/oracle/fast\_recovery\_area/BOOK/backupset/2016\_12\_12/o1\_mf\_annnn\_TAG20161212T095817\_d4w11syb\_.bkp tag=TAG20161212T095817 comment=NONE  
channel ORA\_DISK\_1: backup set complete, elapsed time: 00:00:01  
Finished backup at 2016-12-12 09:58:18

$ ls -ltr /u01/app/oracle/archivelog/book/1\_\*  
\-rw-r----- 1 oracle oinstall 47245824 2016-12-12 09:01:58 /u01/app/oracle/archivelog/book/1\_6\_896605872.dbf  
\-rw-r----- 1 oracle oinstall  1170944 2016-12-12 09:26:56 /u01/app/oracle/archivelog/book/1\_7\_896605872.dbf  
\-rw-r----- 1 oracle oinstall     2048 2016-12-12 09:27:53 /u01/app/oracle/archivelog/book/1\_8\_896605872.dbf  
\-rw-r----- 1 oracle oinstall     3072 2016-12-12 09:28:04 /u01/app/oracle/archivelog/book/1\_9\_896605872.dbf  
\-rw-r----- 1 oracle oinstall   482304 2016-12-12 09:55:58 /u01/app/oracle/archivelog/book/1\_10\_896605872.dbf  
\-rw-r----- 1 oracle oinstall    29696 2016-12-12 09:58:07 /u01/app/oracle/archivelog/book/1\_11\_896605872.dbf  
\-rw-r----- 1 oracle oinstall     1536 2016-12-12 09:58:17 /u01/app/oracle/archivelog/book/1\_12\_896605872.dbf

\--//可以发现多了2个归档日志11,12.也就是讲这样备份对于恢复才有效,因为如果缺少后面的归档日志,可能恢复到某个特定的scn不行.  
\--//可以查看以前的测试链接:[http://blog.itpub.net/267265/viewspace-2106087/][http_blog.itpub.net_267265_viewspace-2106087]  
\--//如果备份时存在写盘操作,scn大于 CHECKPOINT\_CHANGE\#的scn,要记录在控制文件中的. 视图 v$backup\_datafile的字段  
\--//ABSOLUTE\_FUZZY\_CHANGE\#可以反应出来.

3.其他方式备份archivelog呢?

RMAN> backup archivelog all ;  
Starting backup at 2016-12-12 10:15:35  
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=6 RECID=2 STAMP=930387718  
input archived log thread=1 sequence=7 RECID=3 STAMP=930389216  
input archived log thread=1 sequence=8 RECID=4 STAMP=930389273  
input archived log thread=1 sequence=9 RECID=5 STAMP=930389284  
input archived log thread=1 sequence=10 RECID=6 STAMP=930390958  
input archived log thread=1 sequence=11 RECID=7 STAMP=930391087  
input archived log thread=1 sequence=12 RECID=8 STAMP=930391097  
input archived log thread=1 sequence=13 RECID=9 STAMP=930392135  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<=做了一次切换.alter system archive log current;  
channel ORA\_DISK\_1: starting piece 1 at 2016-12-12 10:15:35  
channel ORA\_DISK\_1: finished piece 1 at 2016-12-12 10:15:36  
piece handle=/u01/app/oracle/fast\_recovery\_area/BOOK/backupset/2016\_12\_12/o1\_mf\_annnn\_TAG20161212T101535\_d4w22784\_.bkp tag=TAG20161212T101535 comment=NONE  
channel ORA\_DISK\_1: backup set complete, elapsed time: 00:00:01  
Finished backup at 2016-12-12 10:15:36

\--//如果仅仅备份archivelog all,仅仅切换1次.

RMAN> backup archivelog from time 'trunc(sysdate)';  
Starting backup at 2016-12-12 10:19:11  
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=6 RECID=2 STAMP=930387718  
input archived log thread=1 sequence=7 RECID=3 STAMP=930389216  
input archived log thread=1 sequence=8 RECID=4 STAMP=930389273  
input archived log thread=1 sequence=9 RECID=5 STAMP=930389284  
input archived log thread=1 sequence=10 RECID=6 STAMP=930390958  
input archived log thread=1 sequence=11 RECID=7 STAMP=930391087  
input archived log thread=1 sequence=12 RECID=8 STAMP=930391097  
input archived log thread=1 sequence=13 RECID=9 STAMP=930392135  
input archived log thread=1 sequence=14 RECID=10 STAMP=930392351  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<=做了一次切换.alter system archive log current;  
channel ORA\_DISK\_1: starting piece 1 at 2016-12-12 10:19:11  
channel ORA\_DISK\_1: finished piece 1 at 2016-12-12 10:19:12  
piece handle=/u01/app/oracle/fast\_recovery\_area/BOOK/backupset/2016\_12\_12/o1\_mf\_annnn\_TAG20161212T101911\_d4w28zm4\_.bkp tag=TAG20161212T101911 comment=NONE  
channel ORA\_DISK\_1: backup set complete, elapsed time: 00:00:01  
Finished backup at 2016-12-12 10:19:12

RMAN> backup archivelog from sequence 13;  
Starting backup at 2016-12-12 10:20:11  
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=13 RECID=9 STAMP=930392135  
input archived log thread=1 sequence=14 RECID=10 STAMP=930392351  
input archived log thread=1 sequence=15 RECID=11 STAMP=930392412  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<=做了一次切换.alter system archive log current;  
channel ORA\_DISK\_1: starting piece 1 at 2016-12-12 10:20:12  
channel ORA\_DISK\_1: finished piece 1 at 2016-12-12 10:20:13  
piece handle=/u01/app/oracle/fast\_recovery\_area/BOOK/backupset/2016\_12\_12/o1\_mf\_annnn\_TAG20161212T102012\_d4w2bwwj\_.bkp tag=TAG20161212T102012 comment=NONE  
channel ORA\_DISK\_1: backup set complete, elapsed time: 00:00:01  
Finished backup at 2016-12-12 10:20:13

4.另外的测试:  
$ ls -ltr /u01/app/oracle/archivelog/book/1\_1\*  
\-rw-r----- 1 oracle oinstall  482304 2016-12-12 09:55:58 /u01/app/oracle/archivelog/book/1\_10\_896605872.dbf  
\-rw-r----- 1 oracle oinstall   29696 2016-12-12 09:58:07 /u01/app/oracle/archivelog/book/1\_11\_896605872.dbf  
\-rw-r----- 1 oracle oinstall    1536 2016-12-12 09:58:17 /u01/app/oracle/archivelog/book/1\_12\_896605872.dbf  
\-rw-r----- 1 oracle oinstall 1771008 2016-12-12 10:15:35 /u01/app/oracle/archivelog/book/1\_13\_896605872.dbf  
\-rw-r----- 1 oracle oinstall  304128 2016-12-12 10:19:11 /u01/app/oracle/archivelog/book/1\_14\_896605872.dbf  
\-rw-r----- 1 oracle oinstall    2048 2016-12-12 10:20:12 /u01/app/oracle/archivelog/book/1\_15\_896605872.dbf

RMAN> backup archivelog sequence between 10 and 20;  
Starting backup at 2016-12-12 10:22:49  
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=10 RECID=6 STAMP=930390958  
input archived log thread=1 sequence=11 RECID=7 STAMP=930391087  
input archived log thread=1 sequence=12 RECID=8 STAMP=930391097  
input archived log thread=1 sequence=13 RECID=9 STAMP=930392135  
input archived log thread=1 sequence=14 RECID=10 STAMP=930392351  
input archived log thread=1 sequence=15 RECID=11 STAMP=930392412  
channel ORA\_DISK\_1: starting piece 1 at 2016-12-12 10:22:49  
channel ORA\_DISK\_1: finished piece 1 at 2016-12-12 10:22:50  
piece handle=/u01/app/oracle/fast\_recovery\_area/BOOK/backupset/2016\_12\_12/o1\_mf\_annnn\_TAG20161212T102249\_d4w2hsl0\_.bkp tag=TAG20161212T102249 comment=NONE  
channel ORA\_DISK\_1: backup set complete, elapsed time: 00:00:01  
Finished backup at 2016-12-12 10:22:50  
\--这样不会切换.

总结:  
1.backup database plus archivelog方式,至少切换2次,先备份archivelog,然后数据文件,再切换一次,在备份剩下的archivelog.  
2.backup archivelog all ;,仅仅先切换归档,再备份.  
3.backup archivelog from time 'trunc(sysdate)'; 仅仅先切换归档,再备份.  
4.backup archivelog sequence between 10 and 20; 没有切换.  
5.估计有范围的单独备份都没有切换,仅仅猜测不做测试了.

[http_blog.itpub.net_267265_viewspace-2106087]: http://blog.itpub.net/267265/viewspace-2106087/