Patents by Inventor Jeffrey R. Nelson

Jeffrey R. Nelson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11016896
    Abstract: Maintaining multiple cache areas in a storage device having multiple processors includes loading data from a specific portion of non-volatile storage into a local cache slot in response to a specific processor of a first subset of the processors performing a read operation to the specific portion of non-volatile storage, where the local cache slot is accessible to the first subset of the processors and is inaccessible to a second subset of the processors that is different than the first subset of the processors and includes converting the local cache slot into a global cache slot in response to one of the processors performing a write operation to the specific portion of non-volatile storage, wherein the global cache area is accessible to the first subset of the processors and to the second subset of the processors. Different ones of the processors may be placed on different directors.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: May 25, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Venkata Khambam, Jeffrey R. Nelson, Brian Asselin, Rong Yu
  • Patent number: 10795814
    Abstract: Maintaining multiple cache areas in a storage device having multiple processors includes loading data into a first local cache in response to a first processor of a first subset of the processors performing a read operation to the specific portion of non-volatile storage, where the first local cache is accessible to the first subset of the processors and is inaccessible to other processors, loading data into a second local cache in response to a second processor of the second subset of the processors performing a read operation to the specific portion of non-volatile storage, where the second local cache is accessible to the second subset of the processors and is inaccessible to other processors, and loading data into a global cache in response to one of the processors performing a write operation to the specific portion of non-volatile storage, where the global cache is accessible to all the processors.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: October 6, 2020
    Assignee: EMC IP Holding Company LLC
    Inventors: Jeffrey R. Nelson, Michael J. Scharland, Rong Yu
  • Publication number: 20200159660
    Abstract: Maintaining multiple cache areas in a storage device having multiple processors includes loading data from a specific portion of non-volatile storage into a local cache slot in response to a specific processor of a first subset of the processors performing a read operation to the specific portion of non-volatile storage, where the local cache slot is accessible to the first subset of the processors and is inaccessible to a second subset of the processors that is different than the first subset of the processors and includes converting the local cache slot into a global cache slot in response to one of the processors performing a write operation to the specific portion of non-volatile storage, wherein the global cache area is accessible to the first subset of the processors and to the second subset of the processors. Different ones of the processors may be placed on different directors.
    Type: Application
    Filed: January 23, 2020
    Publication date: May 21, 2020
    Applicant: EMC Holding Company LLC
    Inventors: Venkata Khambam, Jeffrey R. Nelson, Brian Asselin, Rong Yu
  • Patent number: 10579529
    Abstract: Maintaining multiple cache areas in a storage device having multiple processors includes loading data from a specific portion of non-volatile storage into a local cache slot in response to a specific processor of a first subset of the processors performing a read operation to the specific portion of non-volatile storage, where the local cache slot is accessible to the first subset of the processors and is inaccessible to a second subset of the processors that is different than the first subset of the processors and includes converting the local cache slot into a global cache slot in response to one of the processors performing a write operation to the specific portion of non-volatile storage, wherein the global cache area is accessible to the first subset of the processors and to the second subset of the processors. Different ones of the processors may be placed on different directors.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: March 3, 2020
    Assignee: EMC IP Holding Company LLC
    Inventors: Venkata Khambam, Jeffrey R. Nelson, Brian Asselin, Rong Yu
  • Publication number: 20190332528
    Abstract: Maintaining multiple cache areas in a storage device having multiple processors includes loading data from a specific portion of non-volatile storage into a local cache slot in response to a specific processor of a first subset of the processors performing a read operation to the specific portion of non-volatile storage, where the local cache slot is accessible to the first subset of the processors and is inaccessible to a second subset of the processors that is different than the first subset of the processors and includes converting the local cache slot into a global cache slot in response to one of the processors performing a write operation to the specific portion of non-volatile storage, wherein the global cache area is accessible to the first subset of the processors and to the second subset of the processors. Different ones of the processors may be placed on different directors.
    Type: Application
    Filed: April 27, 2018
    Publication date: October 31, 2019
    Applicant: EMC IP Holding Company LLC
    Inventors: Venkata Khambam, Jeffrey R. Nelson, Brian Asselin, Rong Yu
  • Publication number: 20190332534
    Abstract: Maintaining multiple cache areas in a storage device having multiple processors includes loading data into a first local cache in response to a first processor of a first subset of the processors performing a read operation to the specific portion of non-volatile storage, where the first local cache is accessible to the first subset of the processors and is inaccessible to other processors, loading data into a second local cache in response to a second processor of the second subset of the processors performing a read operation to the specific portion of non-volatile storage, where the second local cache is accessible to the second subset of the processors and is inaccessible to other processors, and loading data into a global cache in response to one of the processors performing a write operation to the specific portion of non-volatile storage, where the global cache is accessible to all the processors.
    Type: Application
    Filed: April 27, 2018
    Publication date: October 31, 2019
    Applicant: EMP IP Holding Company LLC
    Inventors: Jeffrey R. Nelson, Michael J. Scharland, Rong Yu