'server' equivalent to 'an instance of the server'

Hi all,
i am confused by certain terms. Sometimes we refer to starting the application server, sometimes we refer to starting an instance of the application server. so is the application server = to an instance of the server?
or do we have to start the main application server before we can start instances of the server?

Hi!,
the answer is .. yes, when you start an Application Server (OAS) you are starting an OAS instance ... but ...
The OAS is a set of components, some of them can have more than one instance (OC4Js) and anothers just one (OHS, Portal, Discoverer, etc), then when you start an OAS you are really starting the component's instances and a monitor (OPMN, ONS) that compose OAS.
The main component on OAS is OPMN, you must start this first.
Regards,
Julio
my 2 cents

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Edit:
I forgot to mention that some time back, here on the forums, I had a discussion with a guy who mentioned that there is a workaround possible to add a target in the current Targets.xml for the second database. I did try it out but still that didn't give me two instances. The most recent one which I added only was accessible.
Update:
I did find that thread,here it is. See if this helps you,
Re: control two database with one database control
HTH
Aman....
Edited by: Aman.... on Oct 28, 2008 7:14 PM
Added Edit
Edited by: Aman.... on Oct 28, 2008 7:28 PM
Added thread

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Hi,
Please see following Microsoft link
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user10127912 wrote:
Hi,
We are planning to install second instance of Oracle 11gR2 in Linux server 2.6.39-400.21.1.el6uek.x86_64 x86_64. This is something we never haven done before. If you have such experience, please give us some insight.
The existing instance has all the standard ports:
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
Enterprise Manager Console HTTP Port (pterpdb02) = 1158
Enterprise Manager Agent Port (pterpdb02) = 3938
What ports should we select for second listener and enterprise manager? Is there anything else that we need to know before we install the second instance?If you want a second database instance, no additional installation is required - as long as you want to run the second instance at the same version as the the first. Just fire up dbca and create the second database. One installation of Oracle (one ORACLE_HOME) is capable of supporting many database instances, though the same may or may not be said of the hardware it is running on.
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SQL Server Analysis Services (PowerPivot) instance returned the following error:

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http://powerpivotgeek.com/2010/02/07/a-connection-corresponding-to-the-embedded-powerpivot-data-was-not-found-in-the-excel-workbook/
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http://technet.microsoft.com/en-us/library/ee210712(v=sql.105).aspx
http://support.microsoft.com/kb/2761246
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/a324436c-9901-494e-9f9b-314399d65ccb/data-refresh-dont-work-for-serverhealthxlsx
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http://technet.microsoft.com/en-us/library/ff487975.aspx
http://mmman.itgroove.net/2013/03/the-data-connection-uses-windows-authentication-and-user-credentials-could-not-be-delegated/
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user10127912 wrote:
Hi,
We are planning to install second instance of Oracle 11gR2 in Linux server 2.6.39-400.21.1.el6uek.x86_64 x86_64. This is something we never haven done before. If you have such experience, please give us some insight.
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What ports should we select for second listener and enterprise manager? Is there anything else that we need to know before we install the second instance?If you want a second database instance, no additional installation is required - as long as you want to run the second instance at the same version as the the first. Just fire up dbca and create the second database. One installation of Oracle (one ORACLE_HOME) is capable of supporting many database instances, though the same may or may not be said of the hardware it is running on.
As already said, one listener is enough. One listener, running from one oracle home, using the default name of LISTENER, running on the defualt port of 1521, is quite capable of -- indeed, WAS DESIGNED TO, supporte multiple database instances of multiple versions running from multiple ORACLE_HOMEs.
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tanww888 wrote:
Thanks for all your responses. I have not dealt with two instances on the same server before. I'll take your advice to start with the same listener for both instances and see if it is causing any issue. My database server is a Oracle Sparc 5120 with plenty of memory and disk space. The second instance that I'm going to create will be much smaller than the first one.
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LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 27-NOV-2012 11:52:40
Copyright (c) 1991, 2009, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=freds-server.i-surname.co.uk)(PORT=1521)))
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Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date 27-NOV-2012 11:50:02
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SNMP OFF
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Listener Log File /opt/oracle/diag/tnslsnr/freds-server/listener/alert/log.xml
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(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=freds-server)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=freds-server)(PORT=8080))(Presentation=HTTP)(Session=RAW))
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Instance "GWORCL", status READY, has 1 handler(s) for this service...
Service "GWORCLXDB.i-status.co.uk" has 1 instance(s).
Instance "GWORCL", status READY, has 1 handler(s) for this service...
The command completed successfully
I suspect that this is not just an OEM issue.
see
Listener working but not working for Enterprise manager oracle 11gr2 Linux.
for configuration files
Edited by: Neill_R on Nov 27, 2012 11:51 AM

This was solved by : Osama_mustafa
in the general questions forum
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'server' equivalent to 'an instance of the server'

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