Two databases on a same OS user/account?????

I know it is possible to have two(or more) databases running on two different OS users/accounts in the same machine.
But can we have two(or more) databases running on the same OS user/account in one machine? Wouldn't there be a conflict at ORACLE_HOME???? Would it work even if i assign different port numbers(say 1521 and 1522) for each database.
Manu

There is no problem to have more than one database managed by same OS user.
There is no problem to have more than one database on same listener port.
There is no conflict to share the same ORACLE_HOME for more than one database (unless they are in different oracle version), after all, that's only the binaries, not the data.
Nicolas.

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Two databases in the same host.

Hi Group,
I have a doupt, It's possible that two databases with the same name, live in the same host, if they have different OracleHomes, and the SO users who were installed with are different? eg.
SO user: oraqas
OracleHome1 : /qas/u01/app/oracle/product/9.2.0
BD: prdsia01
SO user: oracle
OracleHome2: /u01/app/oracle/product/9.2.0
BD: prdsia01
If not, what do you recommend?
Thanks a lot

It's possible that two databases with the same name, live in the same host,
if they have different OracleHomes, and the SO users who were installed with are different? what is "SO users"?
what is "BD: prdsia01"
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The only restriction is that only one instance can be online at a time.

Two database with the same sid but different ORACLE_HOME on one host

two database with the same sid but different
ORACLE_HOME on one host,and if configure them with
two differnt lisnter staticaclly,this abosultely work
because in the lisnter.ora we must provice
ORACLE_HOME variable,with this ORACLE_HOME the client
can differentiate which database to connect,but if
use dynamically register feature,how can the client
tell which database to connect?

Also note that this type of configurtion may not be supported.
Just because a given configuration works in certain given conditions does not mean that it would be supported.
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Hi,
I am trying to setup a single listener to listen to two Databases running in the same system. We are experimenting a Network Architecture & this is a part of our experiment to see what happens..( most of the documentation I have read point out that running two DBs on a sing le system isn't a good idea..).
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# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
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      (PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
    (DESCRIPTION =
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# listener.ora Network Configuration File: C:\OraInfra\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = C:\OraInfra)
      (PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
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        (ADDRESS = (PROTOCOL = TCP)(HOST = 152.69.191.100)(PORT = 1522))
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
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SQL> connect scott/tiger@localhost:1522/CONTENTDB
ERROR:
ORA-12541: TNS:no listenerCan anyone shed some light on this ?
Thanks,
Sandeep

Hi,
Thanks to everyone for your time ! Yes, I now have an understanding of the architecture & I am trying to set up my listener...
Paul, I reconfigured my Listener.ora and started it :-
SID_LIST_LISTENER =
(SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = C:\OraInfra)
      (PROGRAM = extproc)
    (SID_DESC =
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LISTENER =
(DESCRIPTION_LIST =
    (DESCRIPTION =
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C:\OraInfra\bin>c:\OraInfra\bin\lsnrctl
LSNRCTL for 32-bit Windows: Version 10.1.0.4.2 - Production on 16-AUG-2006 10:12
:38
Copyright (c) 1991, 2004, Oracle. All rights reserved.
Welcome to LSNRCTL, type "help" for information.
LSNRCTL> start
Starting tnslsnr: please wait...
TNSLSNR for 32-bit Windows: Version 10.1.0.4.2 - Production
System parameter file is C:\OraInfra\network\admin\listener.ora
Log messages written to C:\OraInfra\network\log\listener.log
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1)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROCipc)
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=152.69.191.100)(PORT=152
1)))
STATUS of the LISTENER
Alias                     LISTENER
Version                   TNSLSNR for 32-bit Windows: Version 10.1.0.4.2 - Produ
ction
Start Date                16-AUG-2006 10:12:45
Uptime                    0 days 0 hr. 0 min. 2 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   C:\OraInfra\network\admin\listener.ora
Listener Log File         C:\OraInfra\network\log\listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=152.69.191.100)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROCipc)))
Services Summary...
Service "CONTENTDB.idc.oracle.com" has 1 instance(s).
Instance "CONTENTDB", status UNKNOWN, has 1 handler(s) for this service...
Service "ORAINFRA.idc.oracle.com" has 1 instance(s).
Instance "ORAINFRA", status UNKNOWN, has 1 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
LSNRCTL>It didn't look suspicious to me I had a peek at the Listener.Log :-
TNSLSNR for 32-bit Windows: Version 10.1.0.4.2 - Production on 16-AUG-2006 10:12:43
Copyright (c) 1991, 2004, Oracle. All rights reserved.
System parameter file is C:\OraInfra\network\admin\listener.ora
Log messages written to C:\OraInfra\network\log\listener.log
Trace information written to C:\OraInfra\network\trace\listener.trc
Trace level is currently 0
Started with pid=3308
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=152.69.191.100)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROCipc)))
TIMESTAMP * CONNECT DATA [* PROTOCOL INFO] * EVENT [* SID] * RETURN CODE
16-AUG-2006 10:12:45 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=)(USER=balajsub))(COMMAND=status)(ARGUMENTS=64)(SERVICE=LISTENER)(VERSION=168821762)) * status * 0
16-AUG-2006 10:12:46 * service_died * 1183The message "service_died" looked fishy & I tried to conect :-
C:\OraInfra\bin>sqlplus /nolog
SQL*Plus: Release 10.1.0.4.2 - Production on Wed Aug 16 10:18:26 2006
Copyright (c) 1982, 2005, Oracle. All rights reserved.
SQL> connect scott/[email protected]:1521/ORAINFRA.idc.oracle.com
SQL> Connected
SQL> connect scott/[email protected]:1521/CONTENTDB.idc.oracle.com
ERROR:
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Can you throw some light on this as well ?
Regards,
Sandeep

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Thanks

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regards
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Two databases on a same OS user/account?????

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