Memory usage gets worse as the number of dimensions increases (because there's more ways in which to build summaries), and also as the number of unique keys inc

Memory usage gets worse as the number of dimensions increases (because there's more ways in which to build summaries), and also as the number of unique keys increases (because there's more of different things to store). The main advantage nanocubes has is that it's a sparse scheme: previous work on fast data cubes for visualization (immens, for example) use a dense storage scheme, and so memory usage goes up proportionally to the size of the address space instead.