Hello,
I'm using the SAP Quicksizer tool to size a SAP BW 7.31 system.
For SAP BW, Quicksizer demands five tables to be input, each one referring to an aspect of the sizing. Table 4 refers to the definition of Infocubes. In this table, the meaning and use of some columns aren't clear to me. The columns are "% master data", "Distinct values", "% dist. val. low", "% distinct val. 1".
Looking at the help provided by the quicksizer tool itself, we see the following explanations:
- % MD
Part of master data on total InfoCube size with the assumption data is the sum of master data and InfoCube data. If you know that you have shared master data, you can enter "0" if you have already considered it once. - Distinct values
Average number of different values over all key figure columns. - % DVL
Percentage of key figures columns with very low number of distinct values (sparse). - % DV1
Percentage of key figure columns with one distinct value (super sparse).
Regardless of the explanation given, I am still not able to figure out the correct interpretation of those fields, and how should I fill them. I looked for other questions and official sap documents, but with no success. Therefore, I would much appreciate with someone could help me with that. Below are some doubts I had when filling the questionnaire.
Thank you,
Péterson
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Here are some questions:
- % MD
How should I calculate this? Is this the size of dimension tables compared to the size of the fact table? Or is this the size I expect the master data referenced in the fact table to occupy in comparison with the size of the cube itself?
- Distinct values
Is this an absolute value? Shouldn't it be the distinct values of all characteristics columns? How should I calculate or infer this?
- % DVL
Shouldn't this refer to the characteristics columns?
- % DV1
Shouldn't this refer to the characteristics columns?
Finally, those fields aren't mandatory. How will they affect the final result output by quicksizer?