[tadlan]

That's just the data structure. Fitting models would be much tougher.

[johnmyleswhite]

That really depends on how you fit models. Maximum likelihood estimation (or MAP estimation) for models of IID database rows is often trivial to implement using an iterative algorithm that applies to both in-memory and out-of-core data stores.

[Nrpf]

You mean IRLS or SGD or something like that?