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Former Member
May 15, 2008 at 01:54 PM

Any real reason for logical partitioning over physical?

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Hi!

I have seen a number of scenarios where SAP BI (assuming BI 7.0 for the rest of the discussion), running in high volume scenarios, have been cluttered by a lot of logically partitioned cubes joined by multi providers....

Obviously the disadvantage of using logical partitions is that it increases maintenance efforts: you need a new update rule for each logical partition (cube) , then you need to manually add/delte cubes from the multiprovider, filtering data in the update rules to reach the correct cube based on time characteristic etc etc...

I have seen one clear advantage which is the parallelization of queries run against a multiprovider - assuming you wan't to all underlying cubes ... but are there any other advantages which overcome the mainenance overhead?

For me it feels like using physical database partitions in the same cube would be the correct decision in 90% of the cases. It seems to me that the underlying RDBMS should be able to handle itself to:

1) Parallellize a query over several physical partitions if needed.

2) Be smart enough to only query the needed partition if the query is restricted based on the partitioning characteristic.

Please correct me anyone? - When is logical partitions really motivated?

Best regards,

Christian

Edited by: Christian on May 15, 2008 3:55 PM