Saving more: just how scalable do scalable systems, the subject of this issue's theme, need to be?

摘要

Just how scalable do scalable systems, the subject of this issue's theme, need to be? There is endless rhetoric on this topic, usually linked to the rate at which disk prices are falling. And the rhetoric is not groundless: If disk prices fall, as they have, by roughly a factor of 10 over three years, implementers do have to take into account that databases will grow.