RMAN need some clarification

[randy]

I'm trying to use RMAN for the first time but I think
I'm confusing my self.

I created a recovery catalog database on server A. The target database
is on Server B.

On which server do I need to execute the actuall RMAN commands?

I was thinking that the actual syntax need to be run on Server A
where I have the recovery catalog database. Am I correct?

Since the recovery catalog and the target database does not need
to be on the same server (for obvious reasons), I
thought that I have to execute the RMAN syntax from the server
that the recovery catalog resides. This wouls also ensure that
the backup files resides on the recovery catalog database server.

Is this assumption correct?

I tried to execute RMAN backup syntax from the server A(the recovery
catalog DB server) but I was not successful.
But I was successful when I executed it from database server where the
target database resides.

Can some one please point to me where I'm wrong and if
my assumptios are correct or wrong?

[julian]

Originally posted by randy

On which server do I need to execute the actuall RMAN commands?

You can start RMAN on either server.

I was thinking that the actual syntax need to be run on Server A
where I have the recovery catalog database. Am I correct?

No. It can be run on the terget as well.

Since the recovery catalog and the target database does not need
to be on the same server (for obvious reasons), I
thought that I have to execute the RMAN syntax from the server
that the recovery catalog resides. This wouls also ensure that
the backup files resides on the recovery catalog database server.

Is this assumption correct?

No. The backupsets will be on the terget/DB server.

I tried to execute RMAN backup syntax from the server A(the recovery
catalog DB server) but I was not successful.

Incompatability issue? Differener Oracle versions? What was the error message?