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    Snapshot metadata arrangement for efficient cloud integrated data management
    64.
    发明授权
    Snapshot metadata arrangement for efficient cloud integrated data management 有权

    公开(公告)号：US11768803B2

    公开(公告)日：2023-09-26

    申请号：US17029920

    申请日：2020-09-23

    Applicant: NetApp, Inc.

    Inventor： Sharad Jain ,  Hrishikesh Ashok Tapaswi ,  Ling Zheng ,  Onkar Bhat ,  Akhil Kaushik

    IPC: G06F16/00 ,  G06F16/11 ,  G06F16/13 ,  G06F11/14

    CPC classification number: G06F16/128 ,  G06F11/1448 ,  G06F11/1464 ,  G06F11/1469 ,  G06F16/13 ,  G06F2201/805 ,  G06F2201/84

    Abstract: A storage appliance arranges snapshot data and snapshot metadata into different structures, and arranges the snapshot metadata to facilitate efficient snapshot manipulation, which may be for snapshot management or snapshot restore. The storage appliance receives snapshots according to a forever incremental configuration and arranges snapshot metadata into different types of records. The storage appliance stores these records in key-value stores maintained for each defined data collection (e.g., volume). The storage appliance arranges the snapshot metadata into records for inode information, records for directory information, and records that map source descriptors of data blocks to snapshot file descriptors. The storage appliance uses a locally generated snapshot identifier as a key prefix for the records to conform to a sort constrain of the key-value store, which allows the efficiency of the key-value store to be leveraged. The snapshot metadata arrangement facilitates efficient snapshot restore, file restore, and snapshot reclamation.

    Synchronous replication
    65.
    发明授权
    Synchronous replication 有权

    公开(公告)号：US11726697B2

    公开(公告)日：2023-08-15

    申请号：US17683009

    申请日：2022-02-28

    Applicant: NetApp Inc.

    Inventor： Michael Robin Eisler ,  Santosh Ananth Rao ,  Akhil Kaushik ,  Yuedong Mu

    IPC: G06F3/06 ,  G06F11/20

    CPC classification number: G06F3/065 ,  G06F3/067 ,  G06F3/0619 ,  G06F11/2058 ,  G06F11/2069 ,  G06F11/2071 ,  G06F11/2082 ,  G06F2201/84

    Abstract: One or more techniques and/or computing devices are provided for synchronous replication. For example, synchronous replication relationships are established between a first storage object (e.g., a file, a logical unit number (LUN), a consistency group, etc.), hosted by a first storage controller, and a plurality of replication storage objects hosted by other storage controllers. In this way, a write operation to the first storage object is implemented in parallel upon the first storage object and the replication storage objects in a synchronous manner, such as using a zero-copy operation to reduce overhead otherwise introduced by performing copy operations. Reconciliation is performed in response to a failure so that the first storage object and the replication storage objects comprise consistent data. Failed write operations and replication write operations are retried, while enforcing a single write semantic. Dependent write order consistency is enforced for dependent write operations, such as overlapping write operations.

    Methods and Systems for Storage Virtual Machine Migration Between Clusters of a Networked Storage System
    68.
    发明申请
    Methods and Systems for Storage Virtual Machine Migration Between Clusters of a Networked Storage System 有权

    公开(公告)号：US20230133014A1

    公开(公告)日：2023-05-04

    申请号：US17729870

    申请日：2022-04-26

    Applicant: NETAPP, INC.

    Inventor： Atul Ramesh Pandit ,  Kalaivani Arumugham ,  Akhil Kaushik ,  Ching-Yuk Paul Ngan ,  Kazunobu Nishime ,  Rakesh Bhargava M R ,  William R. Taylor

    IPC: G06F9/455 ,  G06F9/50

    Abstract: Methods and systems for Vserver migration are provided. Update after claims are finalized. One method includes generating a consistency group (CG) having a plurality of source storage volumes of a source storage virtual machine (Vserver) of a source cluster for a migrate operation to migrate the source storage volumes as a group to a plurality of destination storage volumes of a destination cluster; establishing a mirroring relationship between the source and destination cluster for managing asynchronous transfer of the source storage volumes in the CG to the destination storage volumes during a transfer phase of the migrate operation; replicating a logical interface of the source cluster to the destination cluster, the logical interface providing a network address to access the source cluster; and automatically selecting a destination port at the destination cluster, associated with the replicated logical interface.

    Low overhead resynchronization snapshot creation and utilization
    69.
    发明授权
    Low overhead resynchronization snapshot creation and utilization 有权

    公开(公告)号：US11567674B2

    公开(公告)日：2023-01-31

    申请号：US17498237

    申请日：2021-10-11

    Applicant: NetApp Inc.

    Inventor： Akhil Kaushik ,  Ripulkumar Hemantbhai Patel ,  Vrishali Dattatray Hajare ,  Andrew Eric Dunn ,  Rithin Kumar Shetty

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

    Abstract: One or more techniques and/or computing devices are provided for resynchronization. For example, a request may be received to create pseudo snapshots of a first consistency group, hosted by a first storage controller, and a second consistency group, hosted by a second storage controller, having a synchronous replication relationship with the first consistency group. Incoming client write requests are logged within an intercept tracking log at the first storage controller. After a first drain without hold of incoming write requests is performed, a first pseudo common snapshot of the second consistency group is created. After a second drain without hold of incoming write operations is performed, a second pseudo common snapshot of the first consistency group and the intercept tracking log is created. The pseudo snapshots and the intercept tracking log (e.g., indicating a delta between the pseudo snapshots) are used to resynchronize the first and second consistency groups.

    Resynchronization of individual volumes of a consistency group (CG) within a cross-site storage solution while maintaining synchronization of other volumes of the CG
    70.
    发明授权
    Resynchronization of individual volumes of a consistency group (CG) within a cross-site storage solution while maintaining synchronization of other volumes of the CG 有权

    公开(公告)号：US11537314B1

    公开(公告)日：2022-12-27

    申请号：US17495990

    申请日：2021-10-07

    Applicant: NetApp, Inc.

    Inventor： Murali Subramanian ,  Akhil Kaushik ,  Anoop Vijayan ,  Arun Kumar Selvam

    IPC: G06F3/06

    Abstract: Systems and methods are provided for bringing a volume of a consistency group (CG) into an in-synchronization (InSync) state while other volumes of the CG remain in the InSync state. According to an example, in order to support recovery from disruptive events in a manner that ensures a zero recovery point objective (RPO) guarantee and insulates an application making use of the CG from adverse impacts, responsive to a triggering event, a Fast Resync process may first be attempted to promptly bring an affected volume back into an in-synchronization (InSync) state from an out of synchronization (OOS) state while allowing other members of the CG to remain in the InSync state. Should the Fast resync process be unsuccessful in bringing the volume back into the InSync state within a predetermined or configurable time threshold, then a second type of resynchronization process may be employed at the CG level.

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