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    Performing various operations at the granularity of a consistency group within a cross-site storage solution
    32.
    发明授权
    Performing various operations at the granularity of a consistency group within a cross-site storage solution 有权

    公开(公告)号：US11934670B2

    公开(公告)日：2024-03-19

    申请号：US17219759

    申请日：2021-03-31

    Applicant: NetApp, Inc.

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

    IPC: G06F3/06

    CPC classification number: G06F3/0631 ,  G06F3/0604 ,  G06F3/067

    Abstract: Systems and methods are described for efficiently performing various operations at the granularity of a consistency group (CG) within a cross-site storage solution. An example of one of the various operations includes an independent and parallel resynchronization approach that independently brings individual volumes of a CG to a steady state of in-synchronization (InSync), thereby contributing to scalability of CGs by supporting CGs having a large number of member volumes without requiring a change to the resynchronization process. Another example includes preserving dependent write-order consistency when a remote mirror copy goes out-of-synchronization (OOS) for any reason by driving all member volumes OOS responsive to any member volume becoming OOS. Yet another example includes independent creation of snapshots by member volumes to support efficient and on-demand creation by an application of a common snapshots of all or a subset of peered member volumes of a CG with which the application is associated.

    Enabling data integrity checking and faster application recovery in synchronous replicated datasets
    35.
    发明授权
    Enabling data integrity checking and faster application recovery in synchronous replicated datasets 有权

    公开(公告)号：US11829607B2

    公开(公告)日：2023-11-28

    申请号：US17548990

    申请日：2021-12-13

    Applicant: NetApp Inc.

    Inventor： Pranab Patnaik ,  Akhil Kaushik

    IPC: G06F3/00 ,  G06F3/06 ,  G06F11/20 ,  G06F11/16

    CPC classification number: G06F3/0619 ,  G06F3/065 ,  G06F3/067 ,  G06F11/1662 ,  G06F11/2076 ,  G06F11/2082 ,  G06F2201/82 ,  G06F2201/84

    Abstract: One or more techniques and/or computing devices are provided for utilizing snapshots for data integrity validation and/or faster application recovery. For example, a first storage controller, hosting first storage, has a synchronous replication relationship with a second storage controller hosting second storage. A snapshot replication policy rule is defined to specify that a replication label is to be used for snapshot create requests, targeting the first storage, that are to be replicated to the second storage. A snapshot creation policy is created to issue snapshot create requests comprising the replication label. Thus a snapshot of the first storage and a replication snapshot of the second storage are created based upon a snapshot create request comprising the replication label. The snapshot and the replication snapshot may be compared for data integrity validation (e.g., determine whether the snapshots comprise the same data) and/or quickly recovering an application after a disaster.

    SNAPSHOT METADATA ARRANGEMENT FOR EFFICIENT CLOUD INTEGRATED DATA MANAGEMENT
    36.
    发明公开
    SNAPSHOT METADATA ARRANGEMENT FOR EFFICIENT CLOUD INTEGRATED DATA MANAGEMENT 审中-公开

    公开(公告)号：US20230334013A1

    公开(公告)日：2023-10-19

    申请号：US18333627

    申请日：2023-06-13

    Applicant: NetApp. Inc.

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

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

    CPC classification number: G06F16/128 ,  G06F16/13 ,  G06F11/1464 ,  G06F11/1448 ,  G06F11/1469 ,  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.

    FACILITATING IMMEDIATE PERFORMANCE OF VOLUME RESYNCHRONIZATION WITH THE USE OF PASSIVE CACHE ENTRIES
    39.
    发明申请
    FACILITATING IMMEDIATE PERFORMANCE OF VOLUME RESYNCHRONIZATION WITH THE USE OF PASSIVE CACHE ENTRIES 有权

    公开(公告)号：US20230121272A1

    公开(公告)日：2023-04-20

    申请号：US17505962

    申请日：2021-10-20

    Applicant: NetApp, Inc.

    Inventor： Murali Subramanian ,  Sohan Shetty ,  Rakesh Bhargava ,  Akhil Kaushik

    IPC: G06F16/178 ,  G06F16/172 ,  G06F16/23

    Abstract: Systems and methods for reducing delays between the time at which a need for a resynchronization of data replication between a volume of a local CG and its peer volume of a remote CG is detected and the time at which the resynchronization is triggered (Reseed Time Period) are provided. According to an example, information indicative of the direction of data replication between the volume and the peer volume is maintained within a cache of a node. Responsive to a disruptive operation (e.g., relocation of the volume from an original node to a new node), the Reseed Time Period is lessened by proactively adding a passive cache entry to a cache within the new node at the time the CG relationship is created when the new node represents an HA partner of the original node and prior to the volume coming online when the new node represents a non-HA partner.

    RESYNCHRONIZATION TO A SYNCHRONOUS REPLICATION RELATIONSHIP
    40.
    发明申请
    RESYNCHRONIZATION TO A SYNCHRONOUS REPLICATION RELATIONSHIP 有权

    公开(公告)号：US20230031079A1

    公开(公告)日：2023-02-02

    申请号：US17962516

    申请日：2022-10-09

    Applicant: NetApp Inc.

    Inventor： Akhil Kaushik ,  Krishna Murthy Chandraiah Setty Narasingarayanapeta

    IPC: G06F16/178 ,  G06F16/18 ,  G06F16/27 ,  G06F16/23

    Abstract: Techniques are provided for resynchronizing a synchronous replication relationship. Asynchronous incremental transfers are performed to replicate data of a storage object to a replicated storage object. Incoming write requests, targeting the storage object, are logged into a dirty region log during a last asynchronous incremental transfer. Metadata operations, executed on the storage object, are logged into a metadata log during the last asynchronous incremental transfer. Sequence numbers are assigned to the metadata operations based upon an order of execution. The metadata operations are replicated to the replicated storage object for execution according to the sequence numbers, and the dirty regions are replicated to the replicated storage object in response to the metadata operations having been replicated to the replicated storage object. The storage object and replicated storage object are transitioned to a synchronous replication state where incoming operations are synchronously replicated to the replicated storage object.

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