参考自:
HOW TO RECOVER OFFLINE DROPPED DATAFILE IN ARCHIVELOG MODE (文档 ID 286355.1)
如下的实验基于oracle 11.2.0.4 linux x86-64bit完成
[[email protected] u02]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on Sun Feb 15 20:33:17 2015 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options SQL> archive log list; Database log mode Archive Mode Automatic archival Enabled Archive destination /u02/arch Oldest online log sequence 126 Next log sequence to archive 128 Current log sequence 128 SQL> select file_id from dba_data_files; FILE_ID ---------- 4 3 2 1 5 6 7 8 9 10 11 11 rows selected. SQL> select name from v$dbfile; NAME -------------------------------------------------------------------------------- /u01/app/oracle/oradata/test/users01.dbf /u01/app/oracle/oradata/test/undotbs01.dbf /u01/app/oracle/oradata/test/sysaux01.dbf /u01/app/oracle/oradata/test/system01.dbf /u01/app/oracle/oradata/test/ten01.dbf /u01/app/oracle/oradata/test/tb_test_01.dbf /u01/app/oracle/oradata/test/ts1.dbf /u01/app/oracle/oradata/test/ts2.dbf /u01/app/oracle/oradata/test/test01.dbf /u01/app/oracle/oradata/test/test_uni_sz_2m_01.dbf /u01/app/oracle/oradata/test/test_uni_sz_1m_01.dbf 11 rows selected. SQL> set lines 290 SQL> col file_name format a60 SQL> select FILE_NAME,file_Id from v$dbfile; FILE_NAME FILE_ID ------------------------------------------------------------ ---------- /u01/app/oracle/oradata/test/users01.dbf 4 /u01/app/oracle/oradata/test/undotbs01.dbf 3 /u01/app/oracle/oradata/test/sysaux01.dbf 2 /u01/app/oracle/oradata/test/system01.dbf 1 /u01/app/oracle/oradata/test/ten01.dbf 5 /u01/app/oracle/oradata/test/tb_test_01.dbf 6 /u01/app/oracle/oradata/test/ts1.dbf 7 /u01/app/oracle/oradata/test/ts2.dbf 8 /u01/app/oracle/oradata/test/test01.dbf 9 /u01/app/oracle/oradata/test/test_uni_sz_2m_01.dbf 10 /u01/app/oracle/oradata/test/test_uni_sz_1m_01.dbf 11 11 rows selected. SQL> alter database datafile 9 offline drop; Database altered. SQL> select file#, status from v$datafile where file#='9'; FILE# STATUS ---------- ------- 9 RECOVER SQL> select file#, status from v$datafile_header where file#='9'; FILE# STATUS ---------- ------- 9 OFFLINE SQL> alter system switch logfile ; System altered. SQL> / System altered. SQL> / / / System altered. SQL> System altered. SQL> System altered. SQL> SQL> SQL> SQL> / System altered. SQL> SQL> SQL> archive log list; Database log mode Archive Mode Automatic archival Enabled Archive destination /u02/arch Oldest online log sequence 132 Next log sequence to archive 134 Current log sequence 134 SQL> recover datafile 9; ORA-00279: change 3155176 generated at 02/15/2015 20:34:05 needed for thread 1 ORA-00289: suggestion : /u02/arch/1_128_807882551.dbf ORA-00280: change 3155176 for thread 1 is in sequence #128 Specify log: {<RET>=suggested | filename | AUTO | CANCEL} auto --------------->敲入auto Log applied. Media recovery complete. SQL> select * from v$log; GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME ---------- ---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- --------- ------------ --------- 1 1 133 52428800 512 1 YES INACTIVE 3155684 15-FEB-15 3155687 15-FEB-15 2 1 134 52428800 512 1 NO CURRENT 3155687 15-FEB-15 2.8147E+14 3 1 132 52428800 512 1 YES INACTIVE 3155681 15-FEB-15 3155684 15-FEB-15 SQL> select file#,status from v$datafile where file#=9; FILE# STATUS ---------- ------- 9 OFFLINE SQL> select file#,status from v$datafile_header where file#=9; FILE# STATUS ---------- ------- 9 OFFLINE SQL> alter database datafile 9 online; Database altered. SQL> select file#,status from v$datafile where file#=9; FILE# STATUS ---------- ------- 9 ONLINE SQL>
知识点:
1.The only case in which the offline dropped datafile can not be online is
when you have added to many datafiles in the database after offline drop
2.在非归档模式下,为了让一个datafile 变成offline,必须带drop关键字。
drop关键字不会把datafile从database 中 remove掉。
To do that, you must drop the tablespace in which the datafile resides. Until you
do so, the datafile remains in the data dictionary with the status RECOVER or OFFLINE.
若是database处于归档模式,Oracle会忽略掉drop 关键字.
时间: 2024-08-01 22:43:03