Multiple cubes questions

Dear BW expert,
I have question about Multiple Cubes. What is the advantage and disadvantage to use multiple cubes for reporting performance?
I have following scenarios:
Cube2005, Cube2006, ...... Cube2xxx. (total growing )
Vs.
Cube1, ..... Cube12 (Total 12 cubes)- Based on Fiscal period. If I use this model, how about I want a report for a special year, so in this case I have to access 12 cubes every time. If I build multiprovider on top of this for each year, is that possible?
Pros &  cons?
Any suggestions is greatly appreciated and points awarded!
Weidong

Hi there,
Thanks for your reply!
My case is that we have a huge volume of data for each year, so we decided to build cube per year, but we have to create a lot of cubes in advance and make the maintenance work harder. Then we come up with the idea by using cube per fiscal period/month, so we have fix number of cubes(12), and on top of the 12 cubes, we build multiprovider per year, and then multiprovider on top of the multipovider per year - is that possible?
The main reason is to keep the data size for each cube/ODS small. Anyone has such experience with a large data size cube?
Any comments? Thanks in advance!
Weidong

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