If you are using external procedures, the listener for them should be different as
well. The external procedures run under the authority of the user which started the
listener that has the sid list entry for them. If you place the entry in the main
listener and that listener is initialized by oracle, the external procedures run with
the authority of the oracle OS user. Having a different listener which can be started
by a less privileged account allows the external procedures to run with less
authority.
Ian MacGregor
Stanford Linear Accelerator Center
[EMAIL PROTECTED]
-----Original Message-----
Sent: Monday, July 16, 2001 4:01 PM
To: Multiple recipients of list ORACLE-L
Mladen,
I can think of numerous reasons to have multiple listeners. For
example, imagine a server with several databases where you sometimes
wanted to restrict outside access on just one database. Meanwhile still
allowing local users on that server to access that particular database.
In this case restricted mode wouldn't work, and downing the listener
would restrict remote access to all the databases. With multiple
listeners you could shutdown the listener for just that database.
Outside users would then be unable to connect, but local users would
still be able to work. The other databases would continue as usual...
Another example, Veritas Cluster, is the reason I use multiple
listeners. You need to be able to failover the listener for just one
database, not all of them!
Alan
-----Original Message-----
Sent: Monday, July 16, 2001 4:21 PM
To: Multiple recipients of list ORACLE-L
It is possible to define 3 listeners on 3 different ports, each one
serving another database, but why would you do dat? You have 3 little
databases and one big bad listener whichs huffs and puffs and connects
your clients to the instance of their choice. What would you benefit
from
having 3 listeners?
> -----Original Message-----
> From: Edward W. Carr [mailto:[EMAIL PROTECTED]]
> Sent: Monday, July 16, 2001 5:42 PM
> To: Multiple recipients of list ORACLE-L
> Subject: Multiple Listeners
>
>
> Hello All,
>
> I am currently running Oracle 816 64bit on a Solaris 8 box.
> I have three
> databases on the system with one LISTENER for all of them.
> Is it possible
> to configure multiple listeners, one for each database? We
> have tried in
> the past with no success... If there is a document on the web
> somebody could
> point me to, that would be great! I have searched for one
> but must not be
> searching correctly.
>
> TIA,
> ----------------------------------------------
> Edward W. Carr
> UNIX Systems Administrator
> Qwest Communications
> Broadband Services Inc.
>
>
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