Oracle 10g利用amdu抽取數(shù)據(jù)文件的方法教程

2024-08-29 14:01:23

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前言

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環(huán)境：OEL 5.7 + Oracle 10.2.0.5 RAC

需求：實(shí)驗(yàn)在Oracle 10g環(huán)境使用amdu抽取數(shù)據(jù)庫文件

本文主要目的是介紹3個(gè)知識(shí)點(diǎn)：

1.使amdu可以在oracle 10g環(huán)境中使用

2.使kfed可以在oracle 10g環(huán)境中使用

3.amdu如何抽取損壞的ASM磁盤組數(shù)據(jù)

1.使amdu可以在oracle 10g環(huán)境中使用

在Oracle 10g環(huán)境，并沒有自帶amdu工具，需要自行去下載：

具體可以參考MOS文檔：

Placeholder for AMDU binaries and using with ASM 10g, 11g, 12c (文檔 ID 553639.1)

> $cd <your directory>> $export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:`pwd` > or $setenv LD_LIBRARY_PATH ${LD_LIBRARY_PATH}:`pwd`> $export PATH=$PATH:`pwd` or setenv PATH ${PATH}:`pwd`> > or > > $cd <your directory>> $export LIBPATH=$LIBPATH:`pwd` > or $setenv LIBPATH ${LIBPATH}:`pwd`> $export PATH=$PATH:`pwd` or setenv PATH ${PATH}:`pwd`

注意：如果是AIX平臺(tái)，則對(duì)應(yīng)的是設(shè)置LIBPATH環(huán)境變量。我這里是Linux，所以設(shè)置LD_LIBRARY_PATH環(huán)境變量：

unzip /tmp/amdu_X86-64.zip export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:`pwd` export PATH=$PATH:`pwd`

2.使kfed可以在oracle 10g環(huán)境中使用

在Oracle 10g環(huán)境kfed需要編譯：

ASM tools used by Support : KFOD, KFED, AMDU (文檔 ID 1485597.1)

KFED executable comes with installation from 11.1 onwards; for the older version you must build it.

編譯方法如下：

$cd $ORACLE_HOME/rdbms/lib$make -f ins_rdbms.mk ikfed

3.amdu如何抽取損壞的ASM磁盤組數(shù)據(jù)

在ASM磁盤組損壞時(shí)，如何使用amdu工具來抽取數(shù)據(jù)庫文件：

How to Restore the Database Using AMDU after Diskgroup Corruption (文檔 ID 1597581.1)

1. Create pfile of lost database , from database alert.log startup messages.2. Startup database in nomount3. Get the controlfile number from db alert log , it will show while starting the database here in this eg. its 256eg., control_files='+DATA/orcl/controlfile/current.256.709676643'If you have controlfile backup already in non-asm location edit the pfile to point to location of non-asm and then mount the databaseIf you dont have controlfile backup then go to step 4 after determining the file# from step 34. $ amdu -diskstring <asm_diskstring> -extract DATA.2565. shutdown the database and change the control_file location to point to the extracted file location6. startup mount the database7. once mounted, get the datafile file numbers using "select name from v$datafile" And get online redo logfile from "select * from v$logfile".8. Extract all datafiles and redolog files in similar manner9. alter database rename <datafile 1> to < newly extracte location>10. open the database

實(shí)際可以做實(shí)驗(yàn)去驗(yàn)證下MOS這個(gè)步驟的可行性：

1.創(chuàng)建參數(shù)文件

2.啟動(dòng)數(shù)據(jù)庫到nomount狀態(tài)

3.獲取到控制文件的number

4.抽出控制文件

5.關(guān)閉數(shù)據(jù)庫，修改control_file值

6.啟動(dòng)數(shù)據(jù)庫到mount狀態(tài)

7.獲取到數(shù)據(jù)文件、日志文件的number

8.抽取數(shù)據(jù)文件和redo日志文件

9.重命名數(shù)據(jù)庫文件到新位置

10.打開數(shù)據(jù)庫

總結(jié)