Patents by Inventor Chenqi Zhu

Chenqi Zhu 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).

  • Storage device and control method for storage device
    Patent number: 11531631
    Abstract: The number of QoS group execution IO with respect to a logical device is retained in both of an inter-controller shared memory and an in-controller shared memory. Then, a processor of a storage device compares the number of in-controller execution IO with an update interval threshold value set by the following expression. Update Interval Threshold Value=(“QoS Group IOUpper Limit Value”?(“Number of QoS Group Execution IO” in In-Controller Shared Memory+“Number of In-Controller Execution IO”))דMargin Ratio Coefficient”÷“Number of Controllers in System” Then, the processor adds the number of in-controller execution IO to the number of QoS group execution IO of the inter-controller shared memory when the number of in-controller execution IO is greater than or equal to the update interval threshold value, and performs rewriting in the inter-controller shared memory.
    Type: Grant
    Filed: March 12, 2021
    Date of Patent: December 20, 2022
    Assignee: HITACHI, LTD.
    Inventor: Chenqi Zhu
  • STORAGE DEVICE AND CONTROL METHOD FOR STORAGE DEVICE
    Publication number: 20220138123
    Abstract: The number of QoS group execution IO with respect to a logical device is retained in both of an inter-controller shared memory and an in-controller shared memory. Then, a processor of a storage device compares the number of in-controller execution IO with an update interval threshold value set by the following expression. Update Interval Threshold Value=(“QoS Group IOUpper Limit Value”?(“Number of QoS Group Execution IO” in In-Controller Shared Memory+“Number of In-Controller Execution IO”))דMargin Ratio Coefficient”÷“Number of Controllers in System” Then, the processor adds the number of in-controller execution IO to the number of QoS group execution IO of the inter-controller shared memory when the number of in-controller execution IO is greater than or equal to the update interval threshold value, and performs rewriting in the inter-controller shared memory.
    Type: Application
    Filed: March 12, 2021
    Publication date: May 5, 2022
    Inventor: Chenqi Zhu