CPC G06F 3/061 (2013.01) [G06F 3/064 (2013.01); G06F 3/0641 (2013.01); G06F 3/0653 (2013.01); G06F 3/067 (2013.01); G06F 3/0671 (2013.01)]  20 Claims 
1. A nontransitory machinereadable storage medium comprising instructions that upon execution cause a system to:
compute a measure of data overwrites to a data segment stored in a storage structure, wherein the measure of data overwrites indicates a quantity of overwrites of data in the data segment, wherein the data segment comprises a plurality of subsegments, and the computing of the measure of data overwrites to the data segment comprises:
counting quantities of overwrites of data to respective individual subsegments of the plurality of subsegments, the counting producing measures of data overwrites to the respective individual subsegments, and
computing a mathematical aggregate of the measures of data overwrites to the respective individual subsegments to generate the measure of data overwrites to the data segment;
compare the measure of data overwrites to a criterion; and
in response to determining that the measure of data overwrites has a first relationship with respect to the criterion, disable data reduction for the data segment.
