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第十二章: BACKUP and RECOVERY -
1. v$sga,v$instance,v$process,v$bgprocess,v$database,v$datafile,v$sgastat -
2. Rman need set dbwr_IO_slaves or backup_tape_IO_slaves and large_pool_size -
3. Monitoring Parallel Rollback -
> v$fast_start_servers , v$fast_start_transactions -
4.perform a closed database backup (noarchivelog) -
> shutdown immediate -
> cp files /backup/ -
> startup -
5.restore to a different location -
> connect system/manager as sysdba -
> startup mount -
> alter database rename file \'/disk1/../user.dbf\'to \'/disk2/../user.dbf\'; -
> alter database open; -
6.recover syntax -
--recover a mounted database -
>recover database; -
>recover datafile \'/disk1/data/df2.dbf\'; -
>alter database recover database; -
--recover an opened database -
>recover tablespace user_data; -
>recover datafile 2; -
>alter database recover datafile 2; -
7.how to apply redo log files automatically -
>set autorecovery on -
>recover automatic datafile 4; -
8.complete recovery: -
--method 1(mounted databae) -
>copy c:\backup\user.dbf c:\oradata\user.dbf -
>startup mount -
>recover datafile \'c:\oradata\user.dbf; -
>alter database open; -
--method 2(opened database,initially opened,not system or rollback datafile) -
>copy c:\backup\user.dbf c:\oradata\user.dbf (alter tablespace offline) -
>recover datafile \'c:\oradata\user.dbf\' or -
>recover tablespace user_data; -
>alter database datafile \'c:\oradata\user.dbf\' online or -
>alter tablespace user_data online; -
--method 3(opened database,initially closed not system or rollback datafile) -
>startup mount -
>alter database datafile \'c:\oradata\user.dbf\' offline; -
>alter database open -
>copy c:\backup\user.dbf d:\oradata\user.dbf -
>alter database rename file \'c:\oradata\user.dbf\'to \'d:\oradata\user.dbf\' -
>recover datafile \'e:\oradata\user.dbf\' or recover tablespace user_data; -
>alter tablespace user_data online; -
--method 4(loss of data file with no backup and have all archive log) -
>alter tablespace user_data offline immediate; -
>alter database create datafile \'d:\oradata\user.dbf\'as \'c:\oradata\user.dbf\'\' -
>recover tablespace user_data; -
>alter tablespace user_data online -
5.perform an open database backup -
> alter tablespace user_data begin backup; -
> copy files /backup/ -
> alter database datafile \'/c:/../data.dbf\' end backup; -
> alter system switch logfile; -
6.backup a control file -
> alter database backup controlfile to \'control1.bkp\'; -
> alter database backup controlfile to trace; -
7.recovery (noarchivelog mode) -
> shutdown abort -
> cp files -
> startup -
8.recovery of file in backup mode -
>alter database datafile 2 end backup; -
9.clearing redo log file -
>alter database clear unarchived logfile group 1; -
>alter database clear unarchived logfile group 1 unrecoverable datafile; -
10.redo log recovery -
>alter database add logfile group 3 \'c:\oradata\redo03.log\'size 1000k; -
>alter database drop logfile group 1; -
>alter database open; -
or >cp c:\oradata\redo02.log\' c:\oradata\redo01.log -
>alter database clear logfile \'c:\oradata\log01.log\'; -
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