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    Inline deduplication
    31.
    发明授权
    Inline deduplication 有权

    公开(公告)号：US10585611B2

    公开(公告)日：2020-03-10

    申请号：US15138435

    申请日：2016-04-26

    Applicant: NetApp Inc.

    Inventor： Mukul Sharma ,  Kartik Rathnakar ,  Dnyaneshwar Nagorao Pawar ,  Venkateswarlu Tella ,  Kiran Nenmeli Srinivasan ,  Rajesh Khandelwal ,  Alok Sharma

    IPC: G06F3/06

    Abstract: One or more techniques and/or computing devices are provided for inline deduplication. For example, a checksum hash table and/or a block number hash table may be maintained within memory (e.g., a storage controller may maintain the hash tables in-core). The checksum hash table may be utilized for inline deduplication to identify potential donor blocks that may comprise the same data as an incoming storage operation. Data within an in-core buffer cache is eligible as potential donor blocks so that inline deduplication may be performed using data from the in-core buffer cache, which may mitigate disk access to underlying storage for which the in-core buffer cache is used for caching. The block number hash table may be used for updating or removing entries from the hash tables, such as for blocks that are no longer eligible as potential donor blocks (e.g., deleted blocks, blocks evicted from the in-core buffer cache, etc.).

    INLINE DEDUPLICATION
    32.
    发明申请
    INLINE DEDUPLICATION 审中-公开

    公开(公告)号：US20170308320A1

    公开(公告)日：2017-10-26

    申请号：US15138435

    申请日：2016-04-26

    Applicant: NetApp Inc.

    Inventor： Mukul Sharma ,  Kartik Rathnakar ,  Dnyaneshwar Nagorao Pawar ,  Venkateswarlu Tella ,  Kiran Nenmeli Srinivasan ,  Rajesh Khandelwal ,  Alok Sharma

    IPC: G06F3/06

    CPC classification number: G06F3/0641 ,  G06F3/0605 ,  G06F3/0608 ,  G06F3/0659 ,  G06F3/0665 ,  G06F3/067 ,  G06F3/0679

    Abstract: One or more techniques and/or computing devices are provided for inline deduplication. For example, a checksum hash table and/or a block number hash table may be maintained within memory (e.g., a storage controller may maintain the hash tables in-core). The checksum hash table may be utilized for inline deduplication to identify potential donor blocks that may comprise the same data as an incoming storage operation. Data within an in-core buffer cache is eligible as potential donor blocks so that inline deduplication may be performed using data from the in-core buffer cache, which may mitigate disk access to underlying storage for which the in-core buffer cache is used for caching. The block number hash table may be used for updating or removing entries from the hash tables, such as for blocks that are no longer eligible as potential donor blocks (e.g., deleted blocks, blocks evicted from the in-core buffer cache, etc.).

    Transferring snapshot copy to object store with deduplication preservation and additional compression
    33.
    发明授权
    Transferring snapshot copy to object store with deduplication preservation and additional compression 有权

    公开(公告)号：US12210757B2

    公开(公告)日：2025-01-28

    申请号：US18340976

    申请日：2023-06-26

    Applicant: NetApp Inc.

    Inventor： Tijin George ,  Jagavar Nehra ,  Roopesh Chuggani ,  Dnyaneshwar Nagorao Pawar

    IPC: G06F16/00 ,  G06F3/06 ,  G06F16/11 ,  G06F16/22

    Abstract: Techniques are provided for incremental snapshot copy to an object store. A list of deallocated block numbers of primary storage of a computing device are identified. Entries for the list of deallocated block numbers are removed from a mapping metafile. A list of changed block numbers corresponding to changes between a current snapshot of the primary storage and a prior copied snapshot copied from the primary storage to the object store is determined. The mapping metafile is evaluated using the list of changed block numbers to identify a deduplicated set of changed block numbers without entries within the mapping metafile. An object, comprising data of the deduplicated set of changed block numbers, is transmitted to the object store for storage as a new copied snapshot.

    ON-DEMAND SERVERLESS DISASTER RECOVERY
    36.
    发明公开
    ON-DEMAND SERVERLESS DISASTER RECOVERY 审中-公开

    公开(公告)号：US20230385166A1

    公开(公告)日：2023-11-30

    申请号：US17824120

    申请日：2022-05-25

    Applicant: NetApp Inc.

    Inventor： Dnyaneshwar Nagorao Pawar ,  Sumith Makam ,  Roopesh Chuggani ,  Tijin George

    IPC: G06F11/20 ,  G06F11/14

    CPC classification number: G06F11/2025 ,  G06F11/1469 ,  G06F2201/84

    Abstract: Techniques are provided for on-demand serverless disaster recovery. A primary node may host a primary volume. Snapshots of the primary volume may be backed up to an object store. In response to failure, a secondary node and/or an on-demand volume may be created on-demand. The secondary node may provide clients with failover access to the on-demand volume while a restore process restores a snapshot of the primary volume to the on-demand volume. In some embodiments, there was no secondary node and/or on-demand volume while the primary node was operational. This conserves computing resources that would be wasted by otherwise hosting the secondary node and/or on-demand volume while clients were able to access the primary volume through the primary node. Modifications directed to the on-demand volume are incrementally backed up to the object store for subsequently restoring the primary volume after recovery.

    Transferring snapshot copy to object store with deduplication preservation and additional compression
    40.
    发明授权
    Transferring snapshot copy to object store with deduplication preservation and additional compression 有权

    公开(公告)号：US10852976B2

    公开(公告)日：2020-12-01

    申请号：US16296424

    申请日：2019-03-08

    Applicant: NetApp Inc.

    Inventor： Tijin George ,  Jagavar Nehra ,  Roopesh Chuggani ,  Dnyaneshwar Nagorao Pawar

    IPC: G06F17/00 ,  G06F3/06 ,  G06F16/11 ,  G06F16/22

    Abstract: Techniques are provided for incremental snapshot copy to an object store. A list of deallocated block numbers of primary storage of a computing device are identified. Entries for the list of deallocated block numbers are removed from a mapping metafile. A list of changed block numbers corresponding to changes between a current snapshot of the primary storage and a prior copied snapshot copied from the primary storage to the object store is determined. The mapping metafile is evaluated using the list of changed block numbers to identify a deduplicated set of changed block numbers without entries within the mapping metafile. An object, comprising data of the deduplicated set of changed block numbers, is transmitted to the object store for storage as a new copied snapshot.

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