The information, data, or work presented herein was funded in part by the Advanced Research Projects Agency-Energy (ARPA-E), U.S. Department of Energy, under Award Number DE-AR0000849, DARPA Award Number HR0011-12-2-0016, RISE Lab sponsor Amazon Web Services, and ADEPT/ASPIRE Lab industrial sponsors and affiliates Intel, Google, HP, Huawei, NVIDIA, Seagate, Siemens, and SK Hynix. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government, any agency thereof, or of the industrial sponsors.