Re: need to recreate database

From: <tday6_at_csc.com>
Date: Wed, 11 Jul 2001 07:35:38 -0700
Message-ID: <F001.00346FBB.20010711065045@fatcity.com>

I've done this myself many times. This is the easiest way that works for me.

1. Install Oracle on the new machine (B) with the starter database. This sets up the registry correctly and gives you the database and listener services.
2. Delete the ORANT or ORAwhatever folder on B. You don't need it.
3. Stop the database and listener on your original machine (A).
4. Copy the ORANT or ORAwhatever folder on A to B (that should get you all your *.ora and pfiles - to say nothing of your executables).
5. Move all the data files, redologs, archive logs, control files, etc. to B in the exact same location that they were on A.
6. Edit the listener.ora to reflect the name of the new machine B.
7. On machine B, open CONTROL PANEL, then SERVICES and start the Oracle database and listener services.
8. If this database is replacing the old database, edit the tnsnames.ora on B and on other client machines and replace the hostname of A with the hostname of B. If it's not replacing it, then edit the tnsnames.ora by copying the entry for the old database on A and make a new entry, replacing the hostname of A with B. If you're using OEM, you've got some work there too, but I don't use it so I won't presume to advise you on that.
9. Enjoy your new database.

There is an even easier way but I don't really trust it.

If your new machine is an exact physical clone of the old machine, then stop the database and listener on your old machine and ask your network guys to 'ghost' the new machine from the old machine. You'll still have to do steps 6 and 8 above. I don't like ghosted machines because they seem to end up with less stable operating systems. However, all Windows machines that come with the OS installed by the manufacturer have already been ghosted (you don't really think that Dell and Gateway pay people to sit around and install Windows from the CD, do you?).

So unless your network guys burned the new machine down to a bare disk and did their own OS install you probably won't loose anything by having the old machine ghosted.

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