The problem this algorithm solves is not how to distribute keys in buckets (key mod bucket_size works fine for that) but how to gracefully adapt when bucket_siz

The problem this algorithm solves is not how to distribute keys in buckets (key mod bucket_size works fine for that) but how to gracefully adapt when bucket_size needs to increase. This algorithm minimizes the number of keys that have to be moved to new buckets while incurring no memory overhead nor requiring a complex data structure.