Consolidating multiple sap instances
At the very minimum you should aim to have one logical disk for data files, one for transaction log files, and one for tempdb data files.I prefer to keep the tempdb data files on their own drive so they can be sized to fill the drive and place the tempdb log files with the user database log files where there should be enough free disk space for unexpected autogrow events for any log file.Central Finance is not a new product from SAP; nor does it really provide functionality that was previously unavailable, but it can be seen as an approach to adopting SAP S/4HANA.The approach, instead of forcing customers to migrate to the SAP HANA Database and the S/4 application, allows finance documents to be replicated into a new Central Finance instance that running on S/4HANA.Local directory 'E: empdblogs emplog.ldf' is used for tempdb in a clustered server.
You won’t just find prescriptive rules here, but also the background to the recommendations and guidance on how to choose the best configuration for any particular environment.
This reduces the database footprint; but more importantly allows “HANA Live” reports to function in real-time.
Enabling real-time reporting in the core finance applications can bring significant benefits in decision making and reduce the time for long running processes e.g. For more information on the background to S/4HANA, there's a great FAQ by John Appleby.
Even though tempdb performance was never bad before, the result was a significant reduction in load against the SAN which extended its life by an additional six months.
There are many benefits to SAP S/4HANA for existing SAP customers.