Oracle datafiles....

rajar11 · #1 (**permalink**) 10-11-07, 20:06

Hi All,
I have an AIX 5.3 box with Oracle 10g installed. I cannot seem to open the oracle datafiles which are currently opened by the Oracle DBWR process. Is there any way to prevent Oracle processes from opening the datafiles in exclusive mode?

Thanks,
rajar

anacedent · #2 (**permalink**) 10-11-07, 20:10

>I cannot seem to open the oracle datafiles which are currently opened by the Oracle DBWR process.

Opening them how, with what, and why?

>Is there any way to prevent Oracle processes from opening the datafiles in exclusive mode?

Not as far as I know.

rajar11 · #3 (**permalink**) 10-11-07, 20:15

I have written a program which is suppose to get a hexdump of a block. The program uses open64() call and tries to open the file in O_RDONLY mode. It fails with EINVAL. Found that if the oracle process DBWR is running, the file open fails. If the DB instance is brought down, then I can open the file.

Thanks,
rajar

Littlefoot · #4 (**permalink**) 10-12-07, 02:05

So open the file when DB instance is down

Or, make a backup copy of the file and do with it (with the spare one, I mean) what you want.