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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Temporarily Renaming the sgadefSID.dbf File
Hi
We clone very frequent (once a week at least) on the same machine and never encountered that problem yet, What are the steps you are taking??
Jack
"Morrow,
Steve" To: Multiple recipients of list ORACLE-L
<ORACLE-L_at_fatcity.com>
<SMorrow_at_admin cc:
.usf.edu> Subject: Temporarily Renaming the
sgadefSID.dbf File
Sent by:
root_at_fatcity.c
om
10-04-2001
22:35
Please respond
to ORACLE-L
Hi All,
Trying to clone our PROD to a test database on the same machine for testing our 734-->8i upgrade, and of course we're encountering the "can't-start-the-new-without-shutting-down-the-old" database problem (ie, ORA-9782 on the CREATE CONTROLFILE command). We've worked around this in the past by scheduling a time to bring down PROD.
I know that this is the safest, most reliable way (besides NOT doing this
on
a production box...but I have no choice), but believe it or not, I actually
saw a reference on a Metalink forum to rename the sgadefSID.dbf file, start
up the new database, then rename the file to its original name. Obviously
sgadef gets created at instance startup as a memory map, but it doesn't
look
like it's used for anything after that (it's certainly doesn't seem to be
written to). I do know that you can get an octal dump of the file to
determine the shared memory ID for whatever reason.
Everything else I've heard/seen about this file has pretty much said DON'T TOUCH IT!!! But if the instance only uses it at instance startup, is there any harm in renaming it temporarily to get the other database up? If so...why?
And have any of you tried renaming or deleting the file in your cloning (or other) efforts? Did it blow up, or work?
TIA,
Steve
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Author: Morrow, Steve
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Author:
INET: nlzanen1_at_EY.NL
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