Consolidating SIDs onto same physical servers

Hi,
We are currently running R/3 4.6 and HR 4.7 on seperate physical landscapes (Seperate hardware). The question has been asked "Can we combine these two landscapes onto a single hardware landscape, keeping the SIds seperate"?
I am looking for your experiences in running multiple SIDs on the same physical server. (Pros/Cons/Best Practices) We are currently running Solaris 9 Oracle 9.2
Thanks Rob
[email protected]

Yes you can.
Reasons to do it:
1. Save on maintenance and os administration (less servers).
2. Save on hardware costs (usually cheaper to buy one bigger server and two smaller ones)
Reasons not to do it:
1. Loss of flexibility when performing maintenance (eg. say you need downtime to apply a OS patch - you will now need to have both the systems down at the same time)
2. Complications in the upgrade path - say you want to upgrade one of the systems and this requires you to do a database/os upgrade first. You may be forced to seperate the systems again, or upgrade both concurrently.
There is nothing all that difficult with setting up two ABAP instances to run on the one server - with Oracle, the only complication is in setting up the listener (either to have two different listeners on different ports, or to run one listener for both SID's). There are several OSS Notes that explain how to do this.
Regards,
Jason

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Alan/Patrick,
Hi, sorry, went away on leave for a while so didn’t respond.
Alan – our case was REG:112081612189183.
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ta

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