do you need XI when you not split up CCM (as catalog authoring tool and search engine)?
What are the best experiences until know about splitting up CCM?
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1- do you need XI when you not split up CCM ?
Yes, XI is then mandatory for the publication process.
2- What are the best experiences until know about splitting up CCM?
It is quite difficult to have a real experience on that (CCM 2.0 has just been released).
In my last project we choosed to use the CCM with CAT & CES on the same client than the SRM Server. We made this choice in order to:
-Simplify the architecture and the number of systems
-Simplify the master data management (if CCM is not on the same client than SRM, you'll have to synchronize master data in the CCM client for Vendors, UOM, Currencies, ...).
-Simplify the CCM developments (where we needed to access SRM Server data)
SAP communicates on a better workload management if CAT and CSE are separated, but I don't think anyone can have a real experience on that for the moment.
Hope it helps.
just a correction of Vadim's answer:
1- NO !!! if CAT & CSE are on the same server/client, you don't need XI for publication process.
XI is mandatory for:
- all XML load files upload
- Product/contract/IR extraction from SRM & R/3
- publication in case of distributed deployment.
2- You must balance TCO against performance.
So the architecture decision must be driven by your volumetrics (SRM & CCM) and your sizing results.