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Question: Multi Source Universe against three different Source Systems

Hello Gurus,

I would like to create a universe pointing to three different source systems. I know I can create a dual source universe but is this possible to create universe with more than two sources? I have three different systems and one being SAP ECC. if anyone has already done this and found any interesting facts then please share with me as I'm curious to get to know them.

Thanks,

Abhi

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  • Posted on Dec 31, 2013 at 03:14 AM

    Yes you can do it but a multisource universe means an extra layer of complexity and sytem utilization because you will have to use Data Federation services. Also joins on an ECC source are not true DB joins unless you can do so in an InfoSet or at the FM level. You cannot hit the raw tables in other words. If you must do a join, make sure to compute cardinality so that data federation services know the best semi-join plan. Also avoid bringing back high volumes of results into a multisource universe or it will cripple your APS that runs the DF services.

    You can google or search SCN for most of these topics and find more in depth info but these are the items that come to mind at a high level.

    Hope this helps.

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