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如何重建UNDO TABLESPACE
作者：eygle |【转载时请以超链接形式标明文章出处和作者信息及本声明】链接：http://www.eygle.com/archives/2005/03/ecioeoeundo_tab.html
纯属笔记。
MSN上有朋友问到，在迁移(同平台)的时候由于空间问题，他不打算要现在的UNDO文件，想要重建一个。他打算使用_corrupted_rollback_segments参数。
现在他拥有一个冷备份。
拥有冷备份，那么我们知道这个操作是很简单的，也不用隐含参数:
C:\Documents and Settings\gqgai>sqlplus "/ as sysdba" SQL*Plus: Release 9.2.0.6.0 - Production on Fri Mar 4 20:55:59 2005 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved. Connected to: Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production With the Partitioning, OLAP and Oracle Data Mining options JServer Release 9.2.0.6.0 - Production 20:55:59 SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. 20:56:14 SQL> startup ORACLE instance started. Total System Global Area 59842188 bytes Fixed Size 454284 bytes Variable Size 33554432 bytes Database Buffers 25165824 bytes Redo Buffers 667648 bytes Database mounted. ORA-01157: cannot identify/lock data file 2 - see DBWR trace file ORA-01110: data file 2: 'D:\ORADATA\EYGLE\UNDOTBS01.DBF' 20:59:28 SQL> alter database datafile 'D:\ORADATA\EYGLE\UNDOTBS01.DBF' offline drop; Database altered. Elapsed: 00:00:00.00 20:59:34 SQL> alter database open; Database altered. Elapsed: 00:00:02.04 20:59:40 SQL> select name from v$datafile; NAME ------------------------------------------------------- D:\ORADATA\EYGLE\SYSTEM01.DBF D:\ORADATA\EYGLE\UNDOTBS01.DBF D:\ORADATA\EYGLE\PERFSTAT01.DBF D:\ORADATA\EYGLE\EYGLE.DBF 21:00:55 SQL> create undo tablespace undotbs2 21:01:03 2 datafile 'd:\oradata\eygle\undotbs2.dbf' size 10M; Tablespace created. Elapsed: 00:00:02.02 21:06:29 SQL> ALTER SYSTEM SET undo_tablespace='UNDOTBS2' ; System altered. Elapsed: 00:00:00.01 |
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这篇 【如何重建UNDO TABLESPACE】来自 eygle.com | CSDN网摘| del.icio.us|Google订阅 | 鲜果订阅 | 抓虾订阅
By eygle on 2005-03-04 21:28 | Comments (4) | Posted to Backup&Recovery | Edit |
留言 (4)
我现在有热备（热备没有备UNDO表空间），及热备后的所有归档，及当前日志，数据库是shutdown abort。但我的UNDO表空间下的所有数据文件全丢了，如何进行恢复？
Posted by: hidata at February 27, 2006 1:46 PM
热备没有备UNDO表空间,你这个热备等于没有啊.
现在已经不能使用常规手段恢复了.
Posted by: eygle at February 27, 2006 2:09 PM
:59:28 SQL> alter database datafile 'D:\ORADATA\EYGLE\UNDOTBS01.DBF' offline drop;
Database altered.
Elapsed: 00:00:00.00
20:59:34 SQL> alter database open;
eygle:删除了undo表空间还可以open数据库吗？谢谢！
Posted by: 八头九面 at August 3, 2006 4:19 PM
:59:28 SQL> alter database datafile 'D:\ORADATA\EYGLE\UNDOTBS01.DBF' offline drop;
Database altered.
Elapsed: 00:00:00.00
20:59:34 SQL> alter database open;
eygle:删除了undo表空间还可以open数据库吗？谢谢！
Posted by: 八头九面 at August 3, 2006 4:20 PM