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Oakforest-PACS was shutdown on March 31, 2022.
Thank you to the many researchers who used the service.

About Oakforest-PACS

Oakforest-PACS ranks in the 3rd position in the HPCG benchmark and in the 6th position in the TOP500 list at SC16 in Salt Lake City!

Details of the System

The Oakforest-PACS system has of 8,208 compute nodes, each of which consists of next-generation Intel Xeon Phi processor (code name: Knights Landing), and Intel Omni-Path Architecture (Intel OPA) as a high-performance interconnect, which is a brand-new fabric developed by Intel Corporation. This is the first large scale system with such a processor in Japan. The system is integrated by Fujitsu and its PRIMERGY server is employed as each of compute node. Additionally, the system employs the shared files system (capacity: 26 PB), and the fast file cache system (940 TB), both of which are provided by Data Direct Network (DDN).

Peak performance of the Oakforest-PACS is 25 PFLOPS and the total memory capacity is more than 900 TB. All compute nodes and servers of file systems are connected by fat-tree topology based on Intel OPA, which provides full bisection bandwidth. Therefore, flexible and efficient utilization and operation of compute nodes and file systems is available. Moreover, the fast file cache system is equipped with SSD’s and it is suitable for such applications that require higher file I/O performance.

Basic Specification of Oakforest-PACS

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