start|stop multiple oracle database in the same oracle server

[fox]

how can i start|stop multiple oracle databases in the same oracle server in RHEL4.
i tried the following method to do what i want but it fails with TNS SERVER NAME ERROR! and when i connect to these database via sqlplus i get connected to an idle instance.

-----------------PROCEDURE I FOLLOWED--------------
1. export ORACLE_SID=dbfirst
2. dbstart
3. lsnrctl start

4. export ORACLE_SID=dbsecond
5. dbstart

6. export ORACLE_SID=dbthird
7. dbstart

------------------------------------------------------

right now i first connect to the idle instance in each database via sqlplus then manually start each of them using `startup` command.

I have googled this topic many times and everybody suggests using the ORACLE_SID changes and doing dbstart but this is not working for me.
what am i missing? is there any other way i can start|stop these three databases simultaneously and automatically? automatically is important because i need to start|stop all three databases automatically at system startup|shutdown.


thankyou!

[davey23uk]

set up /etc/oratab and run dbshut / dbstart

but your method should work

[fox]

okie i got to the /etc/oratab.
-----------------------------------------------------------------------------------------------
1 #
2
3 # This file is used by ORACLE utilities. It is created by root.sh
4 # and updated by the Database Configuration Assistant when creating
5 # a database.
6
7 # A colon, ':', is used as the field terminator. A new line terminates
8 # the entry. Lines beginning with a pound sign, '#', are comments.
9 #
10 # Entries are of the form:
11 # $ORACLE_SID:$ORACLE_HOME::
12 #
13 # The first and second fields are the system identifier and home
14 # directory of the database respectively. The third filed indicates
15 # to the dbstart utility that the database should , "Y", or should not,
16 # "N", be brought up at system boot time.
17 #
18 # Multiple entries with the same $ORACLE_SID are not allowed.
19 #
20 #
21 *:/oracle/product/9.2.0:Y
22 #dbfirst:/oracle/product/9.2.0:Y
23 #backup:/oracle/product/9.2.0:Y
24 #dbsecond:/oracle/product/9.2.0:N
25 #dbthird:/oracle/product/9.2.0:N
------------------------------------------------------------------------------------------
from what i have understood if i comment line number's 22,24,25 and replace 'N' with a 'Y' in 24,25 then all three databases (dbfirst,dbsecond and dbthird) would startup at system startup. am i correct?
if its true then cannot i do a similar thing for shutting down all three databases at system shutdown? i mean if dbstart starts up all three db's at system startup (if i use the above procedure) then dbshut should also give a similar response.

[davey23uk]

yes, dbstart and dbshut will open and close the databases with a Y next to them

BUT you have to call dbstart and dbshut in your startup scripts

[stecal]

If all else fails, you can always try reading the documentation.

http://download-west.oracle.com/docs....htm#sthref548