Aggregate Compression - how many requests to keep uncompressed

I'm creating a new aggregate for one of my InfoCubes and I am filling it right now. I'm working on adding the rollup operation to my process chain and I notice that by default, the rollup operation will compress the requests in the aggregate, and you can specify a certain number of requests in the aggregate that you want to leave uncompressed in case they need to be backed out.
What is a standard/good practice for how many requests you should leave uncompressed in the aggregate for a daily delta load? Is a week's worth a good number? A month?
For that matter, should this number match how many requests you leave uncompressed in the InfoCube as well?
I want to be careful about this as I see the documentation says that if you need to back out a compressed request from an aggregate you have to empty and refill the aggregate all over again.
Thanks,
Chris

For an aggregate you rarely backout Requests, consider letting it compress everything in the aggregate. This eliminates the need for a query on the F aggregate altogether. If the time it takes to refill it is a major concern, then leave a week, or whatever is the likely window for something to be backed out, uncompressed.
If the base cube is compressed regularly and has just a couple of weeks of uncompressed Requests, then maybe its easier to just follow that pattern. There is always something to be said for not making things more complicated than they need to be.
Pizzaman

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