[samstokes]

If Redis was "my chosen database" then I should have done my homework better.

Redis has always been billed as an in-RAM database, which hard-implies that your dataset must fit in RAM, and thus that Redis is unlikely to be your only database.

VM - i.e. even the possibility of having a dataset larger than RAM - is a recent addition, and one flagged as experimental. It had some issues which meant (for us and for the author of the post you linked to above) Redis was still not feasible for datasets larger than RAM. This new diskstore model, and the associated rethink, is very encouraging news, as it means that scenario might one day be possible after all.