30 ;;Quote: with twice as many hash buckets as keys, about 1.6 out of every 10,000 buckets will have five or more keys

31 ;;Quote: if hash into the shorter of two buckets, the fraction of buckets with k keys is about (n/km)^2

31 ;;Quote: if hash into two groups of buckets, always break ties into the same group; greatly reduces long chains

32 ;;Quote: better load balancing if randomly chose two machines and pick the less loaded