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Virident/HGST Assigned Patent

Managing write performance of asymmetric memory system
By Francis Pelletier on 2016.11.18

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Virident Systems Inc., Milpitas, CA, an HGST/Western Digital company, has been assigned a patent (9,477,595) developed by Karamcheti, Vijay, Palo Alto, CA, Singhai, Ashish, Cupertino, CA, Mondal, Shibabrata, and Kumar, Ajith, Bangalore, India, for a "managing the write performance of an asymmetric memory system."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "Some implementations include a method of managing a hosted non-volatile random-access memory, (NVRAM) based storage subsystem that includes NVRAM devices. The method includes: receiving, at a device driver on the host computing device, write requests each requesting to write a respective unit of data to the NVRAM-based storage subsystem, categorizing the write requests into subgroups of write requests, where write requests within respective subgroups are mutually exclusive, ascertaining a load condition of each of several of the NVRAM devices of the NVRAM-based storage subsystem, identifying a target location on at least one NVRAM device to service a particular subgroup of write requests according to the ascertained load conditions of the NVRAM devices of the NVRAM-based storage subsystem, and servicing the particular subgroup of write requests by writing the corresponding units of data to the identified target location on the at least one NVRAM device of the NVRAM-based storage subsystem."

The patent application was filed on September 14, 2015 (14/852,844).

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