RE: Not able to find data file on server but database is working fine

From: Elliott, Patrick <patrick.elliott_at_medtronic.com>
Date: Fri, 22 Jun 2007 15:13:51 -0500
Message-ID: <302F06193D7F4D48ABC997408E786BD0022ED1DD@MSPM1BMSGM09.ent.core.medtronic.com>

I didn't mention ASM. ASM is a different animal altogether, and I understand that you are able to insert data and use the file.

Here is the way it works...
When you open a file in UNIX, you are opening an i-node. When you delete a file, the i-node does not get released until all processes that have it open close it. Oracle still has the file open, so the i-node is in use and the database does not even know that the file has been deleted.

Pat

-----Original Message-----

From: Harvinder Singh [mailto:Harvinder.Singh_at_MetraTech.com] Sent: Friday, June 22, 2007 3:08 PM
To: Elliott, Patrick; oracle-l_at_freelists.org Subject: RE: Not able to find data file on server but database is working fine

This is not an ASM instance, also I am able to create table in this tablespace and able to isnert data.

-----Original Message-----

From: Elliott, Patrick [mailto:patrick.elliott_at_medtronic.com] Sent: Friday, June 22, 2007 4:05 PM
To: Harvinder Singh; oracle-l_at_freelists.org Subject: RE: Not able to find data file on server but database is working fine

If the file was deleted outside the database, then it will still be held open while the database is running. The database sees the file because it is still holding the i-node for the file. If this is what happened, then I would quickly create a new tablespace and move everything out of the one that has the hidden file. Otherwise, you will lose all of the data in the tablespace when the database goes down. The only way to recover the file will be to do a recovery from backup and apply the archive logs.

The only other situation that I can see causing this might be file permissions.

Pat

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Harvinder Singh Sent: Friday, June 22, 2007 2:18 PM
To: oracle-l_at_freelists.org
Subject: Not able to find data file on server but database is working fine

Hi,

On the test machine the developer created a new tablespace and I can see in the alert.log file that the command was successful. Also I can see from dba_data_fies that the datafile is available and also the tablespace is showing as Online in dba_tablespaces. Also I am able to create and insert data into table created in this tablespace but problem is I don't see the file on server and I done search(find) as root and don't see file anywhere on the system. Where the file can be and what can be the possible reason for this behavior? Environment: Oracle 10.2.0.3 on RHAT4

Thanks
--Harvinder

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http://www.freelists.org/webpage/oracle-l Received on Fri Jun 22 2007 - 15:13:51 CDT