In enterprise IT, it is common to find storage administrators who will tell you that the company’s default position in regard to data retention is to always store everything forever. Since that policy is hard if not impossible to sustain, enterprises have recently devised policies that allow them to throw some of it away.
Suppose, however, that you were to start from the opposite side of the proposition–never save anything, ever. One could start there and then create policies around what to save. Read the rest of the Blog on CNET.