非归档数据文件offline的恢复
本文主要介绍非归档模式下offline数据文件的恢复，测试过程如下：
SQL> select * from v$version where rownum<3;
BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bi
PL/SQL Release 10.2.0.5.0 - Production
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination /u01/prod_arch
Oldest online log sequence 17
Current log sequence 19
---控件文件中的SCN
SQL> select file#,status,checkpoint_change# from v$datafile order by 1;
FILE# STATUS CHECKPOINT_CHANGE#
---------- ------- ------------------
1 SYSTEM 554606
2 ONLINE 554606
3 ONLINE 554606
4 ONLINE 554606
5 ONLINE 554606
--数据文件头中的SCN
SQL> select file#,status,checkpoint_change# from v$datafile_header order by 1;
FILE# STATUS CHECKPOINT_CHANGE#
---------- ------- ------------------
1 ONLINE 554606
2 ONLINE 554606
3 ONLINE 554606
4 ONLINE 554606
5 ONLINE 554606
--日志文件的情况
SQL> select * from v$Log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- ---------
1 1 19 52428800 1 NO CURRENT 543593 29-OCT-13
2 1 17 52428800 1 YES INACTIVE 500547 29-OCT-13
3 1 18 52428800 1 YES INACTIVE 521183 29-OCT-13
--offline数据文件5，在为进行日志切换的i情况下直接rcover然后在online就可以恢复。
SQL> alter database datafile 5 offline drop;
Database altered.
SQL> alter database datafile 5 online;
alter database datafile 5 online
*
ERROR at line 1:
ORA-01113: file 5 needs media recovery if it was restored from backup, or END BACKUP if it was not
ORA-01110: data file 5: '/u01/app/oracle/oradata/ptod/zxy01.dbf'
SQL> recover datafile 5;
Media recovery complete.
SQL> alter database datafile 5 online;
Database altered.
二、在日志被覆盖的情况下：
SQL> alter system switch logfile;
System altered.
SQL> select file#,checkpoint_change# from v$datafile;
FILE# CHECKPOINT_CHANGE#
---------- ------------------
1 554973
2 554973
3 554973
4 554973
5 554973
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- ---------
1 1 22 52428800 1 NO INACTIVE 554969 30-OCT-13
2 1 23 52428800 1 NO INACTIVE 554971 30-OCT-13
3 1 24 52428800 1 NO CURRENT 554973 30-OCT-13
SQL> alter database datafile 5 offline drop;
Database altered.
SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- ---------
1 1 28 52428800 1 NO CURRENT 555067 30-OCT-13
2 1 26 52428800 1 NO INACTIVE 555052 30-OCT-13
3 1 27 52428800 1 NO INACTIVE 555055 30-OCT-13
SQL> alter database datafile 5 online;
alter database datafile 5 online
*
ERROR at line 1:
ORA-01113: file 5 needs media recovery if it was restored from backup, or END BACKUP if it was not
ORA-01110: data file 5: '/u01/app/oracle/oradata/ptod/zxy01.dbf'
SQL> recover datafile 5;
ORA-00279: change 554973 generated at 10/30/2013 23:28:26 needed for thread 1
ORA-00289: suggestion : /u01/prod_arch/1_24_829999096.dbf
ORA-00280: change 554973 for thread 1 is in sequence #24
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
Media recovery cancelled.
SQL> alter database datafile 5 online;
alter database datafile 5 online
*
ERROR at line 1:
ORA-01113: file 5 needs media recovery if it was restored from backup, or END BACKUP if it was not
ORA-01110: data file 5: '/u01/app/oracle/oradata/ptod/zxy01.dbf'
---下面用bbed来检查点信息：
BBED> info
File# Name Size(blks)
----- ---- ----------
1 /u01/app/oracle/oradata/ptod/system01.dbf 0
2 /u01/app/oracle/oradata/ptod/undotbs03.dbf 0
3 /u01/app/oracle/oradata/ptod/sysaux01.dbf 0
4 /u01/app/oracle/oradata/ptod/users01.dbf 0
5 /u01/app/oracle/oradata/ptod/zxy01.dbf 0
BBED> set file 5 block 1
FILE# 5
BLOCK# 1
BBED> p kcvfhckp
struct kcvfhckp, 36 bytes @484
struct kcvcpscn, 8 bytes @484
ub4 kscnbas @484 0x000877dd---数据文件头的SCN低4字节值
ub2 kscnwrp @488 0x0000
ub4 kcvcptim @492 0x317c161a
ub2 kcvcpthr @496 0x0001
union u, 12 bytes @500
struct kcvcprba, 12 bytes @500
ub4 kcrbaseq @500 0x00000018---数据文件当前写的redolog sequence。
ub4 kcrbabno @504 0x00000002---数据文件当前写的redolog的block号
ub2 kcrbabof @508 0x0010
ub1 kcvcpetb[0] @512 0x02
ub1 kcvcpetb[1] @513 0x00
ub1 kcvcpetb[2] @514 0x00
ub1 kcvcpetb[3] @515 0x00
ub1 kcvcpetb[4] @516 0x00
ub1 kcvcpetb[5] @517 0x00
ub1 kcvcpetb[6] @518 0x00
ub1 kcvcpetb[7] @519 0x00
因此我只需要把红色部分的信息改成与正常的数据文件的值一样，骗过oracle的检测。
BBED> set file 4 blcok 1
FILE# 4
BBED-00202: invalid parameter (blcok)
BBED> set file 4 block 1
FILE# 4
BLOCK# 1
BBED> p kcvfhckp
struct kcvfhckp, 36 bytes @484
struct kcvcpscn, 8 bytes @484
ub4 kscnbas @484 0x0008783b
ub2 kscnwrp @488 0x0000
ub4 kcvcptim @492 0x317c1711
ub2 kcvcpthr @496 0x0001
union u, 12 bytes @500
struct kcvcprba, 12 bytes @500
ub4 kcrbaseq @500 0x0000001c
ub4 kcrbabno @504 0x00000002
ub2 kcrbabof @508 0x0010
ub1 kcvcpetb[0] @512 0x02
ub1 kcvcpetb[1] @513 0x00
ub1 kcvcpetb[2] @514 0x00
ub1 kcvcpetb[3] @515 0x00
ub1 kcvcpetb[4] @516 0x00
ub1 kcvcpetb[5] @517 0x00
ub1 kcvcpetb[6] @518 0x00
ub1 kcvcpetb[7] @519 0x00
BBED> d /v offset 484 count 16
File: /u01/app/oracle/oradata/ptod/users01.dbf (4)
Block: 1 Offsets: 484 to 499 Dba:0x01000001
-------------------------------------------------------
3b780800 0000af76 11177c31 01008e00 l ;x....|1....
<16 bytes per line>
BBED> set file 5 block 1
FILE# 5
BLOCK# 1
BBED> modify /x 3b7808 offset 484
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y
File: /u01/app/oracle/oradata/ptod/zxy01.dbf (5)
Block: 1 Offsets: 484 to 499 Dba:0x01400001
------------------------------------------------------------------------
3b780800 0000af76 1a167c31 01008e00
<32 bytes per line>
BBED> d /v offset 484 count 16
File: /u01/app/oracle/oradata/ptod/zxy01.dbf (5)
Block: 1 Offsets: 484 to 499 Dba:0x01400001
-------------------------------------------------------
3b780800 0000af76 1a167c31 01008e00 l ;x....|1....
<16 bytes per line>
BBED> modify /x 18 offset 500
File: /u01/app/oracle/oradata/ptod/zxy01.dbf (5)
Block: 1 Offsets: 500 to 515 Dba:0x01400001
------------------------------------------------------------------------
18000000 02000000 10000000 02000000
<32 bytes per line>
BBED> sum apply
Check value for File 5, Block 1:
current = 0x9989, required = 0x9989
BBED> exit
----在查看SCN的情况，试着recover
SQL> select file#,checkpoint_change# from v$datafile;
FILE# CHECKPOINT_CHANGE#
---------- ------------------
1 555687
2 555687
3 555687
4 555687
5 554973
SQL> select file#,checkpoint_change# from v$datafile_header;
FILE# CHECKPOINT_CHANGE#
---------- ------------------
1 555687
2 555687
3 555687
4 555687
5 555067
SQL> alter database datafile 5 online;
alter database datafile 5 online
*
ERROR at line 1:
ORA-01113: file 5 needs media recovery if it was restored from backup, or END BACKUP if it was not
ORA-01110: data file 5: '/u01/app/oracle/oradata/ptod/zxy01.dbf'
SQL> recover datafile 5;
Media recovery complete.
SQL> alter database datafile 5 online;
Database altered.
成功online数据文件5！
非归档数据文件offline的恢复的更多相关文章
- 表空间与数据文件Offline,online的区别
首先明确,表空间与数据文件的关系:Oracle数据库表空间有两种,一种smallfile小文件表空间(默认),另一种bigfile大文件表空间: 默认表空间与数据文件的关系:允许一对多的处理方式,一个 ...
- 非系统数据文件损坏，rman备份恢复
实验前提:已经做好备份. SQL> col file_name for a50select file_id,file_name from dba_data_files; FILE_ID FILE ...
- linux删除数据文件无备份恢复
参考 : http://www.lunar2013.com/2013/06/linux-%E8%AF%AF%E5%88%A0%E9%99%A4%E6%96%87%E4%BB%B6%E6%81%A2%E ...
- 数据文件offline 时oracle 干了那些事？
SQL> oradebug setmypid Statement processed. SQL> oradebug unlimit Statement processed. SQL> ...
- 1、通过CP数据文件的方式恢复MySQL 从库 启动后报错：Last_IO_Errno: 1236：A slave with the same server_uuid/server_id as this slave has connected to the master;
1.问题: MySQL从库中查看主从状态: show slave status\G,发现出现IO的报错: Last_IO_Errno: Last_IO_Error: Got fatal error f ...
- rman数据库恢复；关键/非重要文件、影像副本、控制文件、还原点、非归档、增量、新数据库、灾难性回复
运行全然恢复:在 ARCHIVELOG 模式下 丢失了系统重要数据文件: 假设某个数据文件丢失或损坏.且该文件属于 SYSTEM 或 UNDO 表空间,请运行下面步骤: 1. 实例可能会也可能不会自己 ...
- 测试Oracle 11gr2 RAC 非归档模式下，offline drop数据文件后的数据库的停止与启动测试全过程
测试Oracle 11gr2 RAC 非归档模式下,offline drop数据文件后的数据库的停止与启动测试全过程 最近系统出现问题,由于数据库产生的日志量太大无法开启归档模式,导致offline的 ...
- 【Oracle】非RMAN恢复数据文件、控制文件
实验环境:OEL 5.6 oracle 11g(11.2.0.4.0) 注意: system表空间数据文件不能在线recover,需要启动到mount状态再recover: undo表空间数据文件可以 ...
- 05 使用bbed跳过归档恢复数据文件
5 使用BBED跳过归档 在归档模式下,缺失了一部分的归档日志文件,对数据文件进行恢复 1 开启归档 --shutdown immediate --startup mount --alter data ...
随机推荐
- js红包算法【转载】
源文地址:https://juejin.im/post/5ae413946fb9a07a9c03f7f7 <!DOCTYPE html> <html lang="en&qu ...
- loadrunner中controller 中scenario－> rendezvous灰色不可用的解决方法：
1.首先确保lr_rendezvous("login");函数添加成功 Action() { web_set_max_html_param_len("2048" ...
- Asp.net gzip压缩的启用
gzip压缩使用一种压缩算法,对网页内容进行压缩,从而减小了网页体积.使用gizp压缩后减小了服务器的带宽.提高了网页的打开速度.下边看看我找到的一个asp.net中启用gzip压缩方案. 首先,我们 ...
- thinkphp5.0目录结构
下载最新版框架后,解压缩到web目录下面,可以看到初始的目录结构如下: project 应用部署目录 ├─application 应用目录(可设置) │ ├─common 公共模块目录(可更改) │ ...
- CodeForces 909D Colorful Points
题解: 暴力,模拟. 把字符串压缩一下,相同的处理成一位,记录下个数,然后暴力模拟即可. #include <bits/stdc++.h> using namespace std; con ...
- Python-函数总结
把程序分解成较小的部分,主要有3种方法. 函数(function) 对象(object) 模块(module) 本节我们先学习函数.函数是带名字的代码块,可以把多个逻辑封装起来.这样就可以在程序中可以 ...
- y450 archlinux cuda6.5
y450 archlinux cuda6.5 January 28, 2018 4:11 PM archlinux是最新更新版本,gcc版本到了7.几,太新了. [qiangge@lqspc ~]$ ...
- Python 2.7.x 和 3.x 版本的语法区别
<__future__模块> Python 3.x引入了一些与Python 2不兼容的关键字和特性,在Python 2中,可以通过内置的__future__模块导入这些新内容.如果你希望在 ...
- mysql总是无故退出， InnoDB: mmap(68681728 bytes) failed; errno 12
最近发现mysql总是无故退出,(vim /var/log/mysqld.log)查看日志报下面错误: InnoDB: mmap(68681728 bytes) failed; errno 12 开启 ...
- Vue 2.0学习（七）方法与事件
基本用法 以监听一个按钮的点击事件为例,设计一个计数器,每次点击都加1: <div id = "app"> 点击次数:{{ counter }} <button ...