Can I use old dbf, ctl and redo.log files on re-installation? URGENT

Hello,
DB: 10.2.0.1.0
Because of some reasons I am reinstalling Oracle DB in our test server.
Prior to install I removed all files under ORACLE_HOME.
But I am keeping my old datafiles, redo.log & cntrl file.
Is it ok that to define same Database files location where my old files existed?
we have dbf, redo.log, ctl files in that location.
I wonder if I used the same files than I probably do not need to create new data files and also do not need to required import data. This is our test database.
D

If all database files are intact then you can reinstall the Oracle software and just start the pre-existing database. All the files would include the spfile or a copy of the init.ora.
In fact that is one way of doing a version upgrade by overlaying $ORACLE_HOME with the new version. We like to install in a new home since we usually run multiple versions at one time and then start the existing databases using the new release and running the database upgrade scripts one at a time when the release proves stable.
HTH -- Mark D Powell --

Similar Messages

Changing names of datafiles, tempfiles and redo log files

DB version:10g Release 2
Can i use
ALTER DATABASE RENAME FILE ...command to rename datafiles, tempfiles and redo log files?

ScottsTiger wrote:
DB version:10g Release 2
Can i use
ALTER DATABASE RENAME FILE ...command to rename datafiles, tempfiles and redo log files?Why not check the Fine Manual found at tahiti.oracle.com?
Please note that when you use this command, you are doing nothing to the actual files on the OS. You are simply changing the db's knowledge of them, as stored in the control file.

Best RAID configuration for storing Datafiles and Redo log files

Database version:10gR2
OS version: Solaris
Whis is the best RAID level for storing Datafiles and Redo log files?

Oracle recommends SAME - Stripe And Mirror Everything.
In the RAC Starter Kit documentation, they specifically recommend not using RAID5 for things like voting disk and so on.
SAN vendors otoh claims that their RAID5 implementations are as fast as RAID10. They do have these massive memory caches...
But I would rather err on the safer side. I usually insist on RAID10 - and for those databases that I do not have a vested interest in (other than as a DBA), and owners, developers and management accept RAID5, I put the lead pipe away and do not insist on having it my way. :-)

Database in log archive mode and redo log file in mode not archive

Hello,
I have a dabatabase running in archive log mode, recently changed, I have 5 redo log groups and one of them (the current one) shows in the v$log view, that ARC: NO, I mean, no archiving. All redo logs except it shows ARC:Yes
What does it mean?
Am I going to have problems with this redo log file?
Thanks

If you do describe on v$log, you'll find that the full column name is Archived (meaning is it archived yet?).
You could try alter system switch logfile and then check v$log again a few times after.
Use the docu for finding out more about v$ views and so on
http://www.oracle.com/pls/db102/print_hit_summary?search_string=v%24log

Can i see dropped object details in redo log files ?

Good morning !
This redo log records all changes made in datafiles.
If i drop any object , How can i check this entry in redo log file ?
Please help me.

HI,
You wrote two places this question . Written in response to this form. Please see: https://forums.oracle.com/thread/2598633
Thank you

Hierarchial Queries and Redo log files

Hi,
I'm running a hierarchial query (start with, connect by prior, etc.).
The query takes a couple of minutes and apparently is filling up the archive files
(I assume it comes from the redo log files).
Question:
1. Does it make sense that a hierarchial query should so fill up the redo log files (It seems as if all the 'intermediate' results are being written there).
2. What do you suggest I do ??
Thanks,
David

What do you suggest I do ??Post your query and the execution plan or the trace file from tkprof.
How to do that is explained in this thread;
How to post a SQL statement tuning request HOW TO: Post a SQL statement tuning request - template posting

DDL and redo log file

Could someone please tell me whether or not the changes made to the database through a DDL statements are recorded in the redo log files?
Thank you very much.

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Jinan Huang ([email protected]):
Could someone please tell me whether or not the changes made to the database through a DDL statements are recorded in the redo log files?
Thank you very much.<HR></BLOCKQUOTE>
null

Excel 2011 can't open old Excel 98 and Excel X files

I have lots of old Excel workbooks that were created on my Mac that go back at least as far as 1999. They were created in 1998 Excel 8.0 (from Office 98), 2000 Excel 9.0 (from Office 2001), and 2001 Excel 10.0 (from Office v.X) (I'm assuming these were the versions I used way back then because I have always used Office since the beginning of time.) Excel 2011 will not open these files. When I try to open these files, I get the message:
Excel could not open [filename] because some content is unreadable. Do you want to open and repair this workbook? If excel cannot repair the file, some data may be lost.
If I click Open and Repair, Excel hangs.
Of course, being a Mac user since 1983, these files do not have those ugly extensions hanging on the file name, but that really isn't the problem. I can add extensions (like .xls) to the file name, which changes the appearance of the icon, but Excel still hangs when trying to Open and Repair these files.
Can someone explain what the problem is?

Some of those are pretty ancient!
Did you ever install the converter?
Mac users using Word 2004 who receive a Word 2008 for Mac, (or Word 2007 for Windows) document, will not be able to read this without having the Open XML Converter installed, which can be downloaded from Microsoft.
Go to this page:
http://www.microsoft.com/mac/downloads.mspx
and click on the right under Most Popular, 'Open XML File Format Converter for Mac 1.0.2'
This opens a window at the bottom of the page. Scroll that to the bottom and click on English.dmg, and it will download for you as a disk image, which can be installed in the usual way.
After installation you can open and read .xml formatted Word 2008 documents in Word 2004.
Update: This link http://support.microsoft.com/kb/976831 takes you to a newer version 1.1.3 (released Nov 10, 2009).

Can I use Icloud to store and share other files, with other Mac users?

Hello, I was just wondering if I could use iCloud to store and share files with other Mac users over the internet? Thanks!

I would suggest re posting in the iCloud for Mac forum where all the people in here that are experts with that hang out. Good luck.

Use of standby redo log files in primary database

Hi All,
What is the exact use of setting up standby redo log files in the primary database on a data guard setup?
any good documents?

A standby redo log is required for the maximum protection and maximum availability modes and the LGWR ASYNC transport mode is recommended for all databases. Data Guard can recover and apply more redo data from a standby redo log than from archived redo log files alone.
You should plan the standby redo log configuration and create all required log groups and group members when you create the standby database. For increased availability, consider multiplexing the standby redo log files, similar to the way that online redo log files are multiplexed.
refer the link,and Perform the following steps to configure the standby redo log.:-
http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/create_ps.htm#i1225703
If the real-time apply feature is enabled, log apply services can apply redo data as it is received, without waiting for the current standby redo log file to be archived. This results in faster switchover and failover times because the standby redo log files have been applied already to the standby database by the time the failover or switchover begins.
refer the link
http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/log_apply.htm#i1023371

RAID for control and red log files

I'm considering one of these two configurations
Option 1:
2 disks kept as separate disks (not using RAID), storing control01.ctl, redo log group 1 on first disk, and storing control02.ctl, and redo log group 2 on second disk.
Option 2:
2 disks configured as a RAID 1+0 volume (mirroring and striping) holding control01.ctl and a redo log group.
(Data files and third control file are elsewhere on the disk array.)
With option 1, I have the option of dropping a control file and dropping a redo log group if a disk fails and then continuing processing. But with option 2, if the RAID array fails, I'm sunk.
I'm thinking option 1 is better. What do others think? And why?
Thanks in advance,
Chris Curzon

Your Raid option has the following advantage: since it mirrors things, a person can [accidently or maliciously] simultaneously remove all control files and redo logs with a single remove command, effectively crashing the database into near unrecoverability.
Option 1 would have the disadvantage - for the person identified above - in that they would need two separate commands to ruin the system.
But, with simple mirroring, between the first and second command, the system would have halted and hopefully alerted someone that a weird but recoverable thing is happening. And the DBA would be able to get going simply by copying the mirrored file to the other, removed, location.
Message was edited by: Hans Forbrich
To make it clear - the advantage is NOT on the DBA's side ...

Backup vs redo log files

Hi,
Can anyone tell me what's the real difference between a backup file and a redo log file/archived redo log file and the scenarios (examples) when each of them can be used (for example, "......") ? Both are used for database/instance recovery. I have read the concepts of there 2 terms, but I need some additional information about the difference.
Thanks!

Roger25 wrote:
What i still don't understand is how redo mechanism works; I know, redo logs records changes made to the database and it's used to re-do informations in case of a system failure/crash, for example. Ok, let's say I have a huge update, but when the system crash has occured, the transaction is neither comitted, nor rolled back. Then, how this redo is useful? If a system crash occur, all those updates aren't rolled back automatically? So the database state is as before executing that huge update? So in this case, 'what to redo'?No, with the system's crash, the transaction never gets a chance to get committed (and even rolled back) because a commit is only supposed to happen if there is an explicit or implicit commit statement is issued. Now, for the redo , with the statement, a commit marker is entered at the end of the redo stream of that transaction denoting that it's finally over now and for the corresponding transaction, the status is cleared from the transaction table that's stored in the Undo segment in which the Undo information of that transaction is stored. If you have given a huge update, the redo would be very highly required as you should be knowing that it's not all the time that the dirty buffers that are written to the data files unlikely the redo log files which are written every 3 econds. This means, there is a very fair chance that many changes have yet not even propagated to the data files for which the change vectors are now already there in the redo log files. Now, for the sake of clarity, assume that this transaction was actually committed! So now, without those changes be applied to the data files how Oracle can actually show the committed reults when the database next time would be opened? For this purpose, the redo change vectors are required. And for the uncommitted transactions , the applcation of the redo change vectors would keep on updating the Checkpoint numbers of the data files and would eventually get them synched with the control file and redo log files, without which the database would never be opened.
HTH
Aman....

Redo log files deleted

Hello,
One of my friend deleted redo log and control files of one machine in cluster environment. Oracle parallel server(8.1.7) is installed on this cluster.
Redo log and control files of the second disk is still there.
Can i copy the control files and redo log files of the second disk to the first one...??? Will it work ???
Please let me know how should I go by it...??
Thanking in anticipation.
Regards,
Rajeev

Hello,
I don't have any experiences with cluster/parallel server. But in general:
1. Controlfile: shutdown database and cp exisiting controlfile to "old" destination. Filename must be similar to deleted controlfile.
2. Redo Logs: Drop and recreate groups step by step (no user activity recommended). Database won't crash, because members are still "alive" on second disk.
HTH,
juergen_klinsmann

Problem in creating database -Missing Redo log file

I am try to create a new database using DBCA .While creating a database it shows the error oracle instance terminated.Force Disconnected.
My alert log file is
Errors in file /u01/app/oracle/diag/rdbms/oracl/oracl/trace/oracl_ora_5424.trc:
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: '/u01/app/oracle/oradata/oracl/redo01.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Wed Nov 06 10:07:27 2013
Errors in file /u01/app/oracle/diag/rdbms/oracl/oracl/trace/oracl_ora_5424.trc:
ORA-00313: open failed for members of log group 2 of thread 1
ORA-00312: online log 2 thread 1: '/u01/app/oracle/oradata/oracl/redo02.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Errors in file /u01/app/oracle/diag/rdbms/oracl/oracl/trace/oracl_ora_5424.trc:
ORA-00313: open failed for members of log group 3 of thread 1
ORA-00312: online log 3 thread 1: '/u01/app/oracle/oradata/oracl/redo03.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Wed Nov 06 10:07:38 2013
Setting recovery target incarnation to 2
Wed Nov 06 10:07:38 2013
Assigning activation ID 1876274518 (0x6fd5ad56)
Thread 1 opened at log sequence 1
Current log# 1 seq# 1 mem# 0: /u01/app/oracle/oradata/oracl/redo01.log
Successful open of redo thread 1
Wed Nov 06 10:07:38 2013
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
Wed Nov 06 10:07:38 2013
SMON: enabling cache recovery
Errors in file /u01/app/oracle/diag/rdbms/oracl/oracl/trace/oracl_ora_5424.trc (incident=1345):
ORA-00600: internal error code, arguments: [kpotcgah-7], [12534], [ORA-12534: TNS:operation not supported
Incident details in: /u01/app/oracle/diag/rdbms/oracl/oracl/incident/incdir_1345/oracl_ora_5424_i1345.trc
Wed Nov 06 10:07:46 2013
Trace dumping is performing id=[cdmp_20131106100746]
Errors in file /u01/app/oracle/diag/rdbms/oracl/oracl/trace/oracl_ora_5424.trc:
ORA-00600: internal error code, arguments: [kpotcgah-7], [12534], [ORA-12534: TNS:operation not supported
Error 600 happened during db open, shutting down database
USER (ospid: 5424): terminating the instance due to error 600
Instance terminated by USER, pid = 5424
ORA-1092 signalled during: alter database "oracl" open resetlogs...
ORA-1092 : opiodr aborting process unknown ospid (5424_47935551851664)
Wed Nov 06 10:07:47 2013
ORA-1092 : opitsk aborting process
251,1 95%

>I am try to create a new database using DBCA
>Please help me to resolve this issue.My redo log file was missing
DROP and recreate the database. It is a *new* database without any data.
Check what datafile locations and redo log file locations you specify when creating the new database. Check if you have permissions and enough disk space.
Hemant K Chitale

Redo log file contents

How can I check the contents of the redo log files?
I recently install 10g. We haven't used the db yet, but the redo logs are very active.
Is there a query to determine what activity is filling the redo log files?
Thank you for any help.
Take Care.
S

The Automatic Workload Repository takes snapshots of
statistics, via scheduled job, at hourly intervals.
This is probably responsible for some of the redo.
You can see if this feature is turned on by checking
the job queue (simply: select * from dba_jobs).
The default settings on AWR can be managed using the
DBMS_WORKLOAD_REPOSITORY built-in package.
Hope this helps.
Kailash.

Can I use old dbf, ctl and redo.log files on re-installation? URGENT

Similar Messages

Maybe you are looking for