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    LOCKLESS PARITY MANAGEMENT IN A DISTRIBUTED DATA STORAGE SYSTEM
    1.
    发明申请
    LOCKLESS PARITY MANAGEMENT IN A DISTRIBUTED DATA STORAGE SYSTEM 审中-公开

    公开(公告)号：US20170277450A1

    公开(公告)日：2017-09-28

    申请号：US15077420

    申请日：2016-03-22

    Applicant: Seagate Technology LLC

    Inventor： Mark Ish ,  Anant Baderdinni ,  Balakrishnan Sundararaman ,  Shashank Nemawarkar

    IPC: G06F3/06 ,  G06F12/08

    Abstract: Method and apparatus for managing data in a distributed data storage system. In some embodiments, a plurality of storage devices define an overall available memory space. A control circuit stores a first copy of user data from a selected distributed data set in a working set of memory buffers, stores a duplicate, second copy of the user data in an alias set of memory buffers, generates parity data based on the second copy of the user data in the alias set of the memory buffers, and flushes the user data and the parity data from the alias set of memory buffers to the storage devices while the first copy of the user data remains in the working set of the memory buffers. In this way, subsequently received access commands can be serviced using the working set of the memory buffers.

    Method and apparatus to perform a function level reset in a memory controller
    2.
    发明授权
    Method and apparatus to perform a function level reset in a memory controller 有权

    公开(公告)号：US10572180B1

    公开(公告)日：2020-02-25

    申请号：US15141807

    申请日：2016-04-28

    Applicant: Seagate Technology LLC

    Inventor： Shashank Nemawarkar ,  Balakrishnan Sundararaman ,  Chris Randall Stone ,  Charles Edward Peet ,  Allen Vestal ,  Siddharth Krishna Kumar

    IPC: G06F3/06

    Abstract: Systems and methods are disclosed to perform a function level reset in a memory controller, in accordance with certain embodiments of the present disclosure. In some embodiments, an apparatus may comprise a storage controller circuit configured to receive a function reset indicator from a host device, the function reset indicator identifying a selected storage controller function executing at a storage controller of the apparatus. The circuit may abort each command associated with the selected function and pending at the apparatus based on the function reset indicator, verify that no commands associated with the selected function remain pending at the apparatus, and clear registers associated with the selected function based on the determination that no commands associated with the selected function remain.

    Method and apparatus to delete a command queue
    3.
    发明授权
    Method and apparatus to delete a command queue 有权

    公开(公告)号：US10282103B1

    公开(公告)日：2019-05-07

    申请号：US15141744

    申请日：2016-04-28

    Applicant: Seagate Technology LLC

    Inventor： Chris Randall Stone ,  Shashank Nemawarkar ,  Balakrishnan Sundararaman ,  Charles Edward Peet

    IPC: G06F13/24 ,  G06F3/06

    Abstract: Systems and methods are disclosed to delete a command queue, in accordance with certain embodiments of the present disclosure. An apparatus may comprise a circuit configured to receive a queue deletion indicator from a host device, including a queue identifier for a selected command queue to be deleted. The circuit may abort each command associated with the selected command queue and pending at the apparatus based on the queue identifier. Commands associated with the selected queue may be identified in a command table and flagged with an abort bit, which may signal an I/O processing pipeline to abort the command when encountered. The circuit may verify that no commands associated with the selected command queue remain pending at the apparatus, and send a completion indicator to notify the host device that the selected command queue is deleted.

    Method and apparatus to abort a command
    4.
    发明授权
    Method and apparatus to abort a command 有权

    公开(公告)号：US09996262B1

    公开(公告)日：2018-06-12

    申请号：US14936573

    申请日：2015-11-09

    Applicant: Seagate Technology LLC

    Inventor： Shashank Nemawarkar ,  Chris Randall Stone ,  Balakrishnan Sundararaman

    IPC: G06F3/06

    CPC classification number: G06F3/0604 ,  G06F3/0653 ,  G06F3/0673

    Abstract: Systems and methods are disclosed to abort a command at a data storage controller, in accordance with certain embodiments of the present disclosure. In some embodiments, an apparatus may comprise a data storage controller configured to receive an abort indicator from a host device, generate an abort tracking indicator at a receiving unit configured to receive commands from the host device, monitor to determine when the selected command is received at the receiving unit based on the abort tracking indicator, and abort the selected command when the selected command is received at the receiving unit. In some embodiments, the data storage controller may generate an abort tracking indicator at a completion unit configured to notify the host device of completed commands, and monitor for the selected command at the completion unit based on the abort tracking indicator.

    Lockless parity management in a distributed data storage system
    6.
    发明授权
    Lockless parity management in a distributed data storage system 有权

    公开(公告)号：US10564865B2

    公开(公告)日：2020-02-18

    申请号：US15077420

    申请日：2016-03-22

    Applicant: Seagate Technology LLC

    Inventor： Mark Ish ,  Anant Baderdinni ,  Balakrishnan Sundararaman ,  Shashank Nemawarkar

    IPC: G06F3/06 ,  G06F12/08 ,  G06F12/0866

    Abstract: Method and apparatus for managing data in a distributed data storage system. In some embodiments, a plurality of storage devices define an overall available memory space. A control circuit stores a first copy of user data from a selected distributed data set in a working set of memory buffers, stores a duplicate, second copy of the user data in an alias set of memory buffers, generates parity data based on the second copy of the user data in the alias set of the memory buffers, and flushes the user data and the parity data from the alias set of memory buffers to the storage devices while the first copy of the user data remains in the working set of the memory buffers. In this way, subsequently received access commands can be serviced using the working set of the memory buffers.

    Method and apparatus to perform a function level reset in a memory controller
    10.
    发明授权
    Method and apparatus to perform a function level reset in a memory controller 有权

    公开(公告)号：US11119691B1

    公开(公告)日：2021-09-14

    申请号：US16747402

    申请日：2020-01-20

    Applicant: Seagate Technology LLC

    Inventor： Shashank Nemawarkar ,  Balakrishnan Sundararaman ,  Chris Randall Stone ,  Charles Edward Peet ,  Allen Vestal ,  Siddharth Krishna Kumar

    IPC: G06F3/06

    Abstract: Systems and methods are disclosed to perform a function level reset in a memory controller, in accordance with certain embodiments of the present disclosure. In some embodiments, an apparatus may comprise a storage controller circuit configured to receive a function reset indicator from a host device, the function reset indicator identifying a selected storage controller function executing at a storage controller of the apparatus. The circuit may abort each command associated with the selected function and pending at the apparatus based on the function reset indicator, verify that no commands associated with the selected function remain pending at the apparatus, and clear registers associated with the selected function based on the determination that no commands associated with the selected function remain.

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