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    Distributed File System that Provides Scalability and Resiliency
    22.
    发明公开
    Distributed File System that Provides Scalability and Resiliency 审中-公开

    公开(公告)号：US20230367746A1

    公开(公告)日：2023-11-16

    申请号：US18359192

    申请日：2023-07-26

    Applicant: NetApp, Inc.

    Inventor： Ravikanth Dronamraju ,  Ananthan Subramanian ,  Daniel McCarthy ,  Christopher Cason ,  Arindam Banerjee

    IPC: G06F16/188 ,  G06F16/182 ,  G06F9/50

    CPC classification number: G06F16/188 ,  G06F16/182 ,  G06F9/5077

    Abstract: In various examples, data storage is managed using a distributed storage management system that is resilient. Data blocks of a logical block device may be distributed across multiple nodes in a cluster. The logical block device may correspond to a file system volume associated with a file system instance deployed on a selected node within a distributed block layer of a distributed file system. Each data block may have a location in the cluster identified by a block identifier associated with each data block. Each data block may be replicated on at least one other node in the cluster. A metadata object corresponding to a logical block device that maps to the file system volume may be replicated on at least another node in the cluster. Each data block and the metadata object may be hosted on virtualized storage that is protected using redundant array independent disks (RAID).

    Failover methods and system in a networked storage environment
    23.
    发明授权
    Failover methods and system in a networked storage environment 有权

    公开(公告)号：US11714731B2

    公开(公告)日：2023-08-01

    申请号：US17648531

    申请日：2022-01-20

    Applicant: NETAPP, INC.

    Inventor： Ratnesh Gupta ,  Kalaivani Arumugham ,  Ram Kesavan ,  Ravikanth Dronamraju

    IPC: G06F11/20 ,  G06F11/16

    CPC classification number: G06F11/2069 ,  G06F11/1662 ,  G06F11/2064 ,  G06F11/2058 ,  G06F11/2071 ,  G06F11/2082 ,  G06F2201/82

    Abstract: Failover methods and systems for a storage environment are provided. During a takeover operation to take over storage of a first storage system node by a second storage system node, the second storage system node copies information from a first storage location to a second storage location. The first storage location points to an active file system of the first storage system node, and the second storage location is assigned to the second storage system node for the takeover operation. The second storage system node quarantines storage space likely to be used by the first storage system node for a write operation, while the second storage system node attempts to take over the storage of the first storage system node. The second storage system node utilizes information stored at the second storage location during the takeover operation to give back control of the storage to the first storage system node.

    Methods for minimizing fragmentation in SSD within a storage system and devices thereof
    24.
    发明授权
    Methods for minimizing fragmentation in SSD within a storage system and devices thereof 有权

    公开(公告)号：US11592986B2

    公开(公告)日：2023-02-28

    申请号：US17486160

    申请日：2021-09-27

    Applicant: NetApp Inc.

    Inventor： Ravikanth Dronamraju ,  Shivali Gupta ,  Kyle Sterling ,  Atul Goel

    IPC: G06F3/06 ,  G06F12/02 ,  G06F12/0868

    Abstract: A method, non-transitory computer readable medium, and device that assists with reducing memory fragmentation in solid state devices includes identifying an allocation area within an address range to write data from a cache. Next, the identified allocation area is determined for including previously stored data. The previously stored data is read from the identified allocation area when it is determined that the identified allocation area comprises previously stored data. Next, both the write data from the cache and the read previously stored data are written back into the identified allocation area sequentially through the address range.

    Distributed File System that Provides Scalability and Resiliency
    25.
    发明申请
    Distributed File System that Provides Scalability and Resiliency 有权

    公开(公告)号：US20220391359A1

    公开(公告)日：2022-12-08

    申请号：US17449758

    申请日：2021-10-01

    Applicant: NetApp, Inc.

    Inventor： Ravikanth Dronamraju ,  Ananthan Subramanian ,  Daniel McCarthy ,  Christopher Cason ,  Arindam Banerjee

    IPC: G06F16/188 ,  G06F16/182 ,  G06F9/50

    Abstract: A distributed storage management system comprising nodes that form a cluster, a distributed block layer that spans the nodes in the cluster, and file system instances deployed on the nodes. Each file system instance comprises a data management subsystem and a storage management subsystem disaggregated from the data management subsystem. The storage management subsystem comprises a node block store that forms a portion of the distributed block layer and a storage manager that manages a key-value store and virtualized storage supporting the node block store. A file system volume hosted by the data management subsystem maps to a logical block device hosted by the virtualized storage in the storage management subsystem. The key-value store includes, for a data block of the logical block device, a key that comprises a block identifier for the logical block device and a value that comprises the data block.

    Distributed File System with Disaggregated Data Management and Storage Management Layers
    26.
    发明申请
    Distributed File System with Disaggregated Data Management and Storage Management Layers 有权

    公开(公告)号：US20220391138A1

    公开(公告)日：2022-12-08

    申请号：US17449753

    申请日：2021-10-01

    Applicant: NetApp, Inc.

    Inventor： Ravikanth Dronamraju ,  Arindam Banerjee

    IPC: G06F3/06 ,  G06F16/188 ,  G06F16/182

    Abstract: A method for managing data storage using a distributed file system. A file system volume associated with a write request received at a data management subsystem is identified. A logical block device associated with the file system volume is identified. A plurality of data blocks is formed based on the write request. The plurality of data blocks is distributed across a plurality of node block stores in a distributed block layer of a storage management subsystem of the distributed file system. Each of the plurality of node block stores corresponds to a different node of a plurality of nodes in the distributed storage system. The storage management subsystem operates separately from but in communication with the data management subsystem.

    Failover methods and system in a networked storage environment
    27.
    发明授权
    Failover methods and system in a networked storage environment 有权

    公开(公告)号：US11249869B1

    公开(公告)日：2022-02-15

    申请号：US17026785

    申请日：2020-09-21

    Applicant: NETAPP, INC.

    Inventor： Ratnesh Gupta ,  Kalaivani Arumugham ,  Ram Kesavan ,  Ravikanth Dronamraju

    IPC: G06F11/20 ,  G06F11/16

    Abstract: Failover methods and systems for a storage environment are provided. During a takeover operation to take over storage of a first storage system node by a second storage system node, the second storage system node copies information from a first storage location to a second storage location. The first storage location points to an active file system of the first storage system node, and the second storage location is assigned to the second storage system node for the takeover operation. The second storage system node quarantines storage space likely to be used by the first storage system node for a write operation, while the second storage system node attempts to take over the storage of the first storage system node. The second storage system node utilizes information stored at the second storage location during the takeover operation to give back control of the storage to the first storage system node.

    Selectively storing data into allocation areas using streams
    28.
    发明授权
    Selectively storing data into allocation areas using streams 有权

    公开(公告)号：US10761750B2

    公开(公告)日：2020-09-01

    申请号：US15453949

    申请日：2017-03-09

    Applicant: NetApp Inc.

    Inventor： Ravikanth Dronamraju ,  Kyle Diggs Sterling ,  Mrinal K. Bhattacharjee ,  Mohit Gupta

    IPC: G06F12/00 ,  G06F3/06 ,  H04L29/06 ,  H04L29/08

    Abstract: Techniques are provided for selectively storing data into allocation areas using streams. A set of allocation areas (e.g., ranges of block numbers such as virtual block numbers) are defined for a storage device. Data having particular characteristics (e.g., user data, metadata, hot data, cold data, randomly accessed data, sequentially accessed data, etc.) will be sent to the storage device for selective storage in corresponding allocation areas. For example, when a file system receives a write stream of hot data, the hot data may be assigned to a stream. The stream will be tagged using a stream identifier that is used as an indicator to the storage device to process data of the stream using an allocation area defined for hot data. In this way, data having different characteristics will be stored/confined within particular allocation areas of the storage device to reduce fragmentation and write amplification.

    Distributed File System that Provides Scalability and Resiliency
    30.
    发明申请
    Distributed File System that Provides Scalability and Resiliency 有权

    公开(公告)号：US20250013614A1

    公开(公告)日：2025-01-09

    申请号：US18780353

    申请日：2024-07-22

    Applicant: NetApp, Inc.

    Inventor： Ravikanth Dronamraju ,  Ananthan Subramanian ,  Daniel McCarthy ,  Christopher Cason ,  Arindam Banerjee

    IPC: G06F16/188 ,  G06F9/50 ,  G06F16/182

    Abstract: A distributed storage management system comprising nodes that form a cluster, a distributed block layer that spans the nodes in the cluster, and file system instances deployed on the nodes. Each file system instance comprises a data management subsystem and a storage management subsystem disaggregated from the data management subsystem. The storage management subsystem comprises a node block store that forms a portion of the distributed block layer and a storage manager that manages a key-value store and virtualized storage supporting the node block store. A file system volume hosted by the data management subsystem maps to a logical block device hosted by the virtualized storage in the storage management subsystem. The key-value store includes, for a data block of the logical block device, a key that comprises a block identifier for the logical block device and a value that comprises the data block.

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