Throttling of an iterative process in a computer system is disclosed. In one aspect, a sequence of objects is segmented into object clusters based on: comparisons of successive object intervals to weighted measures of cluster extent; and comparisons of successive object intervals to weighted measures of cluster object density. The storage apparatus provides space-saving and high-capacity storage without belt crossovers. Each of the recessed regions define a sidewall and a floor. The lattice includes at least two input signal nodes and at least one output signal node and is configured to transform and communicate a plurality of input signals from the input node to the output node. Afterwards, the consistency requester may indicate that a consistent view is no longer needed.