Re: Have 10g and 11g on the same server

The answers to these questions depend a lot on your requirements.

The decision about whether to use separate owners for each installation should be based purely on your security requirements. If there is no reason to separate who can access which binaries, then you should use a single user for both.

You can use multiple inventories on a single server but it makes things much more complicated and is not recommended unless you really need to do it. If not, use a single inventory and make sure all of your binary owners are in the same group (oinstall).

As for your installation directories, Oracle (and I) recommend using OFA. Your base directory should be /<mount point>/app/<software owner>. Your oracle inventory directory should be /<mount point>/app/oraInventory. Your oracle home should be $ORACLE_BASE/product/<version>/dbhome_1. Here <http://docs.oracle.com/cd/E11882_01/install.112/e47689/pre_install.htm#LADBI1195>is the documentation reference for 11.2.

Keep things as simple and as close to oracle specifications as possible while still meeting your security requirements and you'll be thankful when (not if) something goes wrong.

Seth Miller

On Mon, Jul 14, 2014 at 6:26 AM, Oliver <ofabelo_at_gmail.com> wrote:

> Ok, thank you very much Martin.
> I've read better now and yes, I see that the better option is a same user
> for both installations, same base dir and different oracle_homes. And only
> the listener of the highest version running.
> Thank you very much.
>
> Cheers...
>
>
> 2014-07-14 12:12 GMT+01:00 Martin Berger <martin.a.berger_at_gmail.com>:
>
> Hi Oliver,
>>
>> Not an advise, just an info from my current env:
>> I have 1 os-user ("oracle"), 1 oraInventory, 2 ORACLE_HOMEs
>> (/.../.../rdbms_10205, /.../.../rdbms_11204), listener in version 11.2 - it
>> works fine.
>> (in fact it's a 2 node cluster with GRID in Version 11.2 as well, but
>> this does not affect your question)
>>
>> Just make sure the OS supports both versions (e.g. Oracle 10 is not
>> certified with RedHat6)
>>
>> hth
>> Martin
>>
>>
>>
>> On Mon, Jul 14, 2014 at 12:51 PM, Oliver <ofabelo_at_gmail.com> wrote:
>>
>>> Hi,
>>> I have to mount 2 instances in a same server, one of 10g and another of
>>> 11g.
>>> I would like about recommendations to follow please.
>>> For example, do you recommend me use a same oracle user or one for each
>>> instance, for example, one named oracle10 and another named oracle11 :-? If
>>> I do this, there will be 2 orainventory directories? Is it a bad practice?
>>> Or I can indicated the same orainventory of the first installation and it
>>> isn't bad practice?
>>> I have thought for example a base dir for 10g as /u01/app/oracle10 and
>>> base dir for 11g as /u01/app/oracle11.
>>> And about listener, may I configure only the 11g listener for both
>>> instances or do you recommend me that each one has its own listener?
>>> Some more recommendations please?
>>> Thanks beforehand.
>>>
>>> Cheers...
>>>
>>
>>
>

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