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    Distributed file system with reduced write and read latencies
    31.
    发明授权
    Distributed file system with reduced write and read latencies 有权

    公开(公告)号：US12141104B2

    公开(公告)日：2024-11-12

    申请号：US17449760

    申请日：2021-10-01

    Applicant: NetApp, Inc.

    Inventor： Ananthan Subramanian ,  Daniel McCarthy ,  Arindam Banerjee

    IPC: G06F16/00 ,  G06F16/16 ,  G06F16/182 ,  G06F16/188 ,  H04L67/00

    Abstract: A method for reducing write latency in a distributed file system. A write request that includes a volume identifier is received at a data management subsystem deployed on a node within a distributed storage system. The data management subsystem maps the volume identifier to a file system volume and maps the file system volume to a set of logical block addresses in a logical block device in a storage management subsystem deployed on the node. The storage management subsystem maps the logical block device to a metadata object for the logical block device on the node that is used to process the write request. The mapping of the file system volume to the set of logical block addresses in the logical block device enables co-locating the metadata object with the file system volume on the node, which reduces the write latency associated with processing the write request.

    Distributed file system that provides scalability and resiliency
    32.
    发明授权
    Distributed file system that provides scalability and resiliency 有权

    公开(公告)号：US12045207B2

    公开(公告)日：2024-07-23

    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: G06F16/18 ,  G06F9/50 ,  G06F16/182 ,  G06F16/188

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

    Distributed file system that provides scalability and resiliency
    33.
    发明授权
    Distributed file system that provides scalability and resiliency 有权

    公开(公告)号：US12038886B2

    公开(公告)日：2024-07-16

    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: G06F16/18 ,  G06F9/50 ,  G06F16/182 ,  G06F16/188

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

    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).

    Distributed File System with Disaggregated Data Management and Storage Management Layers
    35.
    发明公开
    Distributed File System with Disaggregated Data Management and Storage Management Layers 审中-公开

    公开(公告)号：US20230393787A1

    公开(公告)日：2023-12-07

    申请号：US18452814

    申请日：2023-08-21

    Applicant: NetApp, Inc.

    Inventor： Ravikanth Dronamraju ,  Arindam Banerjee

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

    CPC classification number: G06F3/0659 ,  G06F3/0604 ,  G06F3/067 ,  G06F16/182 ,  G06F3/064 ,  G06F3/0664 ,  G06F16/188 ,  G06F3/0644

    Abstract: Systems and methods for managing data storage using a distributed file system are provided. In one example, a file system instance is deployed virtually in a node of a distributed storage system. The file system instance has a dynamic configuration including a set of services corresponding to a cluster management subsystem and a storage management subsystem. The storage management subsystem operates independently of a data management subsystem of the distributed storage system as a result of disaggregation from the data management subsystem. The data management subsystem performs storage and block management functions based on requests received from an application layer. An additional service corresponding to either the data management subsystem or the storage management subsystem is deployed virtually to meet the demand for the additional service in response to determining the presence of a demand for the additional service and availability a set of resources corresponding to the additional service.

    Cache flushing and interrupted write handling in storage systems
    38.
    发明授权
    Cache flushing and interrupted write handling in storage systems 有权

    公开(公告)号：US10235288B2

    公开(公告)日：2019-03-19

    申请号：US14874157

    申请日：2015-10-02

    Applicant: NetApp, Inc.

    Inventor： Arindam Banerjee ,  Donald R Humlicek ,  Scott Terrill

    IPC: G06F12/00 ,  G06F12/0804 ,  G06F12/12 ,  G06F12/0868 ,  G06F12/0891 ,  G06F12/126

    Abstract: Systems and techniques for cache management are disclosed that provide improved cache performance by prioritizing particular storage stripes for cache flush operations. The systems and techniques may also leverage features of the storage devices to provide atomicity without the overhead of inter-controller mirroring. In some embodiments, the systems and techniques include a storage controller that stores data in a cache. The data is associated with one or more sectors of a storage stripe that is defined over plurality of storage devices. The storage controller identifies a locality of dirty sectors of the one or more sectors, classifies the storage stripe into a category based on the locality, provides a category ordering of the category relative to at least one other category, and flushes the storage stripe from the cache to the plurality of storage devices according to the category ordering.

    Migration between CPU cores
    39.
    发明授权
    Migration between CPU cores 有权

    公开(公告)号：US09910700B2

    公开(公告)日：2018-03-06

    申请号：US14836331

    申请日：2015-08-26

    Applicant: NetApp, Inc.

    Inventor： Kent Prosch ,  Matthew Weber ,  Arindam Banerjee ,  Ben McDavitt

    IPC: G06F9/455 ,  G06F9/48 ,  G06F9/50 ,  G06F13/24

    CPC classification number: G06F9/4812 ,  G06F9/4856 ,  G06F9/5088 ,  G06F13/24

    Abstract: A method for migration of operations between CPU cores, the method includes: processing, by a source core, one or more tasks and one or more interrupt service routines; accessing a mapping corresponding to a task of the one or more tasks and an interrupt service routine of the one or more interrupt service routines; identifying, based on the mapping, a target core that corresponds to the task and the interrupt service routine; blocking the task from being processed by the source core in response to identifying the target core; in response to identifying the target core, disabling an interrupt corresponding to the interrupt service routine; in response to identifying the target core, assigning the task and the interrupt to the target core; after assigning the interrupt to the target core, enabling the interrupt; and after assigning the task to the target core, processing the task by the target core.

    Cache Flushing and Interrupted Write Handling in Storage Systems
    40.
    发明申请
    Cache Flushing and Interrupted Write Handling in Storage Systems 审中-公开

    公开(公告)号：US20170097886A1

    公开(公告)日：2017-04-06

    申请号：US14874157

    申请日：2015-10-02

    Applicant: NetApp, Inc.

    Inventor： Arindam Banerjee ,  Don Humlicek ,  Scott Terrill

    IPC: G06F12/08 ,  G06F12/12

    CPC classification number: G06F12/0804 ,  G06F12/0868 ,  G06F12/0891 ,  G06F12/12 ,  G06F12/126 ,  G06F2212/604

    Abstract: Systems and techniques for cache management are disclosed that provide improved cache performance by prioritizing particular storage stripes for cache flush operations. The systems and techniques may also leverage features of the storage devices to provide atomicity without the overhead of inter-controller mirroring. In some embodiments, the systems and techniques include a storage controller that stores data in a cache. The data is associated with one or more sectors of a storage stripe that is defined over plurality of storage devices. The storage controller identifies a locality of dirty sectors of the one or more sectors, classifies the storage stripe into a category based on the locality, provides a category ordering of the category relative to at least one other category, and flushes the storage stripe from the cache to the plurality of storage devices according to the category ordering.

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