try with:

OPS =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = tcp) (HOST = DB1) (PORT = 1526))
       (ADDRESS = (PROTOCOL = tcp) (HOST = DB2) (PORT = 1526))
    )
    (CONNECT_DATA = (SERVICE_NAME = OPS))
  )

----- Original Message -----
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
Sent: Wednesday, August 29, 2001 5:15 PM


> Dear list !
> I've got an OPS database named OPS with 2 instances OPS1 and OPS2 .
> I want the users to connect to OPS1 and ONLY if it is down , to connect to
> OPS2.
> It's Oracle 8.0.5.1 on NT4.
>
> I put the following lines in clients' tnsnames.ora file :
>
> OPS.world = (DESCRIPTION_LIST =
> (DESCRIPTION =
>   (ADDRESS = (PROTOCOL = tcp) (HOST = DB1) (PORT = 1526))
>   (CONNECT_DATA = (SID = OPS1))
> )
> (DESCRIPTION =
>   (ADDRESS = (PROTOCOL = tcp) (HOST = DB2) (PORT = 1526))
>   (CONNECT_DATA = (SID = OPS2))
> )
> )
>
> This works perfectly fine except for the case when OPS1 instance is down ,
> but the listener is up.
> Then clients try to connect to OPS1 and fail - "Oracle not available" .
> When i bring the listener on OPS1 host down - everybody perfectly connect
to
> OPS2.
>
> Is there a solution ?
> Thanks a lot in advance !
>
>
> DBAndrey
>
> * 03-9254520
> * 053-464562
> * mailto:[EMAIL PROTECTED]
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Andrey Bronfin
>   INET: [EMAIL PROTECTED]
>
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-- 
Author: claudio cutelli
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