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    Coordinating snapshot operations across multiple file systems
    21.
    发明授权
    Coordinating snapshot operations across multiple file systems 有权

    公开(公告)号：US12169472B2

    公开(公告)日：2024-12-17

    申请号：US18361966

    申请日：2023-07-31

    Applicant: NetApp Inc.

    Inventor： Ananthan Subramanian ,  Matthew Fontaine Curtis-Maury ,  Ram Kesavan ,  Rupa Natarajan ,  Vinay Devadas

    IPC: G06F16/11

    Abstract: Techniques are provided for coordinating snapshot operations across multiple file systems. A notification may be received that a snapshot of data stored across a persistent memory file system and a storage file system is to be generated. Forwarding, of modify operations from a persistent memory tier to a file system tier for execution through the storage file system, may be enabled. Framing may be initiated to notify the storage file system of blocks within the persistent memory file system that comprise more up-to-date data than corresponding blocks within the storage file system. In response to the framing completing, a consistency point operation is performed to create the snapshot and to create a snapshot image as part of the snapshot.

    PERSISTENT MEMORY FILE SYSTEM RECONCILIATION
    22.
    发明申请
    PERSISTENT MEMORY FILE SYSTEM RECONCILIATION 有权

    公开(公告)号：US20240411645A1

    公开(公告)日：2024-12-12

    申请号：US18809170

    申请日：2024-08-19

    Applicant: NetApp, Inc.

    Inventor： Matthew Fontaine Curtis-Maury ,  Ram Kesavan ,  Ananthan Subramanian ,  Abdul Basit ,  Vinay Devadas ,  Yash Hetal Trivedi

    IPC: G06F11/14 ,  G06F13/16 ,  G06F16/182

    Abstract: Techniques are provided for persistent memory file system reconciliation. As part of the persistent memory file system reconciliation, high level file system metadata associated with a persistent memory file system of persistent memory is reconciled. Client access to the persistent memory file system is inaccessible until reconciliation of the high level file system metadata has completed. A first scanner is executed to traverse pages of the persistent memory in order to fix local inconsistencies associated with the pages. A local inconsistency of a first set of metadata or data of a page is fixed using a second set of metadata or data of the page. The first scanner is executed asynchronously in parallel with processing client I/O directed to the persistent memory file system.

    FILE SYSTEM FORMAT FOR PERSISTENT MEMORY
    25.
    发明公开
    FILE SYSTEM FORMAT FOR PERSISTENT MEMORY 审中-公开

    公开(公告)号：US20230336183A1

    公开(公告)日：2023-10-19

    申请号：US18186657

    申请日：2023-03-20

    Applicant: NetApp Inc.

    Inventor： Ram Kesavan ,  Matthew Fontaine Curtis-Maury ,  Abdul Basit ,  Vinay Devadas ,  Ananthan Subramanian ,  Mark Smith

    IPC: H03M1/06 ,  G06F3/06 ,  G06F16/901

    CPC classification number: H03M1/0687 ,  G06F3/0604 ,  G06F3/0653 ,  G06F3/0685 ,  G06F16/9027 ,  H03M1/0695

    Abstract: Techniques are provided for implementing a file system format for persistent memory. A node, comprising persistent memory, receives an operation comprising a file identifier and file system instance information. A list of file system info objects are evaluated to identify a file system info object matching the file system instance information. An inofile, identified by the file system info object as being associated with inodes of files within an instance of the file system targeted by the operation, is traversed to identify an inode matching the file identifier. If the inode comprises an indicator that the file is tiered into the persistent memory, then the inode it utilized to facilitate execution of the operation upon the persistent memory. Otherwise, the operation is routed to a storage file system tier for execution by a storage file system upon storage associated with the node.

    Persistent memory file system reconciliation
    27.
    发明授权
    Persistent memory file system reconciliation 有权

    公开(公告)号：US11630733B2

    公开(公告)日：2023-04-18

    申请号：US17018176

    申请日：2020-09-11

    Applicant: NetApp Inc.

    Inventor： Matthew Fontaine Curtis-Maury ,  Ram Kesavan ,  Ananthan Subramanian ,  Abdul Basit ,  Vinay Devadas ,  Yash Hetal Trivedi

    IPC: G06F11/00 ,  G06F11/14 ,  G06F13/16 ,  G06F16/182

    Abstract: Techniques are provided for persistent memory file system reconciliation. As part of the persistent memory file system reconciliation, high level file system metadata associated with a persistent memory file system of persistent memory is reconciled. Client access to the persistent memory file system is inaccessible until reconciliation of the high level file system metadata has completed. A first scanner is executed to traverse pages of the persistent memory in order to fix local inconsistencies associated with the pages. A local inconsistency of a first set of metadata or data of a page is fixed using a second set of metadata or data of the page. The first scanner is executed asynchronously in parallel with processing client I/O directed to the persistent memory file system.

    DATA MANAGEMENT ACROSS A PERSISTENT MEMORY TIER AND A FILE SYSTEM TIER
    28.
    发明申请
    DATA MANAGEMENT ACROSS A PERSISTENT MEMORY TIER AND A FILE SYSTEM TIER 有权

    公开(公告)号：US20220357848A1

    公开(公告)日：2022-11-10

    申请号：US17871951

    申请日：2022-07-24

    Applicant: NetApp Inc.

    Inventor： Ananthan Subramanian ,  Matthew Fontaine Curtis-Maury ,  Ram Kesavan ,  Vinay Devadas

    IPC: G06F3/06 ,  G06F11/07 ,  G06F9/448 ,  G06F9/30

    Abstract: Techniques are provided for data management across a persistent memory tier and a file system tier. A block within a persistent memory tier of a node is determined to have up-to-date data compared to a corresponding block within a file system tier of the node. The corresponding block may be marked as a dirty block within the file system tier. Location information of a location of the block within the persistent memory tier is encoded into a container associated with the corresponding block. In response to receiving a read operation, the location information is obtained from the container. The up-to-date data is retrieved from the block within the persistent memory tier using the location information for processing the read operation.

    FILE SYSTEM FORMAT FOR PERSISTENT MEMORY
    29.
    发明申请
    FILE SYSTEM FORMAT FOR PERSISTENT MEMORY 有权

    公开(公告)号：US20210328593A1

    公开(公告)日：2021-10-21

    申请号：US17364946

    申请日：2021-07-01

    Applicant: NetApp Inc.

    Inventor： Ram Kesavan ,  Matthew Fontaine Curtis-Maury ,  Abdul Basit ,  Vinay Devadas ,  Ananthan Subramanian ,  Mark Smith

    IPC: H03M1/06 ,  G06F3/06 ,  G06F16/901

    Abstract: Techniques are provided for implementing a file system format for persistent memory. A node, comprising persistent memory, receives an operation comprising a file identifier and file system instance information. A list of file system info objects are evaluated to identify a file system info object matching the file system instance information. An inofile, identified by the file system info object as being associated with inodes of files within an instance of the file system targeted by the operation, is traversed to identify an inode matching the file identifier. If the inode comprises an indicator that the file is tiered into the persistent memory, then the inode it utilized to facilitate execution of the operation upon the persistent memory. Otherwise, the operation is routed to a storage file system tier for execution by a storage file system upon storage associated with the node.

    PERSISTENT MEMORY ARCHITECTURE
    30.
    发明申请
    PERSISTENT MEMORY ARCHITECTURE 有权

    公开(公告)号：US20210326216A1

    公开(公告)日：2021-10-21

    申请号：US16852593

    申请日：2020-04-20

    Applicant: NetApp Inc.

    Inventor： Ananthan Subramanian ,  Ram Kesavan ,  Matthew Fontaine Curtis-Maury ,  Mark Smith

    IPC: G06F11/14 ,  G06F11/20 ,  G06F3/06

    Abstract: Techniques are provided for implementing a persistent memory storage tier to manage persistent memory of a node. The persistent memory is managed by the persistent memory storage tier at a higher level within a storage operating system storage stack than a level at which a storage file system of the node is managed. The persistent memory storage tier intercepts an operation targeting the storage file system. The persistent memory storage tier retargets the operation from targeting the storage file system to targeting the persistent memory. The operation is transmitted to the persistent memory.

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