n almost all BW systems which have been live for 3-4 years , it is a standard sight to see the following :
1. ODSes like Delivery Items , Material Movements etc having millions of entries ( this of course depends on the usage of these functions in SAP )
Very often a change request comes along which requires an enhancement to these ODSes and in lieu of the the time this would take - a lot of sister ODSes spring up all around these mega ODSes leading to a proliferation of Infosets and cubes and Multiproviders.. which in turn lead us into very difficult data modeling choices
Read more at : http://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/27892
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