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The second phase<ref>{{Cite web|url=http://www.nersc.gov/users/computational-systems/cori/configuration/cori-intel-xeon-phi-nodes/|title=Cori Intel Xeon Phi (KNL) Nodes|website=www.nersc.gov|language=en|access-date=2018-02-09}}</ref> of Cori, installed in summer 2016,<ref>{{Cite web|url=http://www.nersc.gov/news-publications/nersc-news/nersc-center-news/2016/cori-supercomputer-now-fully-installed-at-berkeley-lab/|title=Cori Supercomputer Now Fully Installed at Berkeley Lab|website=www.nersc.gov|language=en|access-date=2018-02-09}}</ref> added another 52 cabinets and more than 9,300 nodes with second-generation [[Intel Xeon Phi]] processors (code-named Knights Landing, or KNL for short), making Cori the largest{{Citation needed|date=January 2022}} supercomputing system for open science based on KNL processors. With 68 active physical cores on each KNL and 32 on each Haswell processor, Cori has almost 700,000 [[Processor core|processor cores]]. The two phases of Cori are integrated via the Cray Aries interconnect, which has a dragonfly [[network topology]] that provides scalable [[Bandwidth (computing)|bandwidth]].
Cori features a Burst Buffer based on the Cray DataWarp technology. The Burst Buffer, a 1.5 PB layer of [[Non-volatile random-access memory|NVRAM]] storage, sits between compute node memory and Cori's 30-[[petabyte]] Lustre parallel scratch [[file system]]. The burst buffer provides about 1.5 TB/sec of [[Input/output|I/O]] bandwidth, more than twice that of the scratch file system. NERSC has also added software-defined [[networking]] features to Cori to more efficiently move data in and out of the system, giving users end-to-end connectivity and bandwidth for real-time data analysis, and a real-time queue for time-sensitive analyses of data.
NERSC used to run a system called Edison, a [[Cray XC30]] named in honor of American inventor and scientist [[Thomas Edison]], which has a peak performance of 2.57 petaflop/s. Fully installed in 2014, Edison consists of 133,824 compute cores for running scientific applications, 357 [[terabytes]] of memory, and 7.56 petabytes of online disk storage with a peak I/O bandwidth of 168 [[Gigabyte|gigabytes]] (GB) per second. Edison was replaced by Perlmutter. In May 2019, the computer was shutdown and shipped back to Cray.<ref>{{Cite web|url=https://www.nersc.gov/news-publications/nersc-news/nersc-center-news/2019/edison-supercomputer-to-retire-after-five-years-of-service/|title = NERSC's Edison Supercomputer to Retire after Five Years of Service}}</ref>
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