... accepted, but also atgreater risk of eviction. Reservoir sampling is a folk-lore algorithm that was extended by Vitter (1985) toallow for multiple updates. Reservoir Counting If we are sampling over ... integer4For example, if we have a reservoir of size 5, containingthree values of −1, and two values of 1, then the exchangeabil-ity of the elements means the reservoir is fully characterized ... meanlength 3. The goal of reservoir counting is to effi-ciently keep track of an approximation of their sums(here: 3, -1, 1, and -1), while the underlying feature5E.g., a reservoir of size k =...