Ascending rows to cluster, or null for every live row
OptionalEpsilonDBSCAN: neighbourhood radius (0-1, exclusive)
OptionalKK-Means: number of clusters
OptionalMaxK-Means: iteration cap
OptionalMinDBSCAN: minimum neighbours for a core point
OptionalToleranceK-Means: convergence tolerance
A clustering run over a store snapshot (optionally a subset of its rows).