Question

How to open .dmp file?

Asked by: premnathgingan

Hi All,

My client is having problem with restoring the .dmp file where their database already crashed. The .dmp file is 6gb and there is no way to open the file because its showing memory is not enough to open the file. Is there anyway to open the file because we need to get the tablespace to restore the database.

Thanks and regards.

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Asked On
2008-05-11 at 02:16:08ID23392506
Topic

Oracle 8.x

Participating Experts
2
Points
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Comments
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Answers

 

by: johnsonePosted on 2008-05-11 at 04:15:49ID: 21542110

The imp command is made to read .dmp files.

You can run

imp file=<file>.dmp show=y indexfile=indfil.txt

That should create a file called indfil.txt that should show you the contents of the .dmp file.

 

by: LindaCPosted on 2008-05-18 at 16:19:55ID: 21594429

Next time to to an export with compress in it and then when wanting to import you do an invert of what you do to do the export.  
For oracle 8.x there is a bug, so it is important to export with the parameter direct=y:

After the export (EXP) process, the produced dump file may contain
corrupted data. [BUG:2410612] <ml2_documents.showDocument?p_id=2410612&p_database_id=BUG>

Example of compressed exports in unix .sh:
First, crete the pipe in the directory of the export like this:

mknod exp_pipe.dmp p

Then create the script:  exp_db.sh


After creating the script change the permissions of the script:
chmod u+x exp_db.sh

Create the "inverted" import script:
First create a pipe for the import, in this way you avoid the "break pipe" that once happened to me:

mknod imp_pipe.dmp p

Example of the imp_db.sh script:

Then change the permissions in the same way for the imp_db.sh script

cat /home/app/oracle/exports/exp_pipe.dmp | compress > /home/app/oracle/exports/mapdb.dmp.Z &
exp backup_user/backup_user file=/home/app/oracle/exports/exp_pipe.dmp full=y statistics=none RECORDLENGTH=65535 direct=y
 
Import script:
 
uncompress < /home/app/oracle/exports/mapdb.dmp.Z> /home/app/oracle/exports/imp_pipe.dmp & imp file=/home/app/oracle/exports/imp_pipe.dmp userid=backup_user/backup_user full=y log=/home/app/oracle/logs/imp.log ignore=Y BUFFER=94370000
                                              
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