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    READ AMPLIFICATION REDUCTION IN A VIRTUAL STORAGE SYSTEM WHEN COMPRESSION IS ENABLED FOR A ZONED CHECKSUM SCHEME
    11.
    发明公开
    READ AMPLIFICATION REDUCTION IN A VIRTUAL STORAGE SYSTEM WHEN COMPRESSION IS ENABLED FOR A ZONED CHECKSUM SCHEME 审中-公开

    公开(公告)号：US20230315315A1

    公开(公告)日：2023-10-05

    申请号：US17708271

    申请日：2022-03-30

    Applicant: NetApp, Inc.

    Inventor： Ritika ,  Jagadish Vasudeva ,  Vani Vully ,  Raj Kamal ,  Deepak Dangi ,  Parag Deshmukh

    IPC: G06F3/06

    CPC classification number: G06F3/064 ,  G06F3/0664 ,  G06F3/0659 ,  G06F3/0619 ,  G06F3/0689

    Abstract: Systems and methods for reducing read application in a virtual storage system are provided. According to one embodiment, read amplification is reduced when AZCS compression is being utilized by avoiding restarting of a read process via a slow path via a RAID layer of the virtual storage system when a data block associated with a read request and obtained via a first fast path read has been found not to be compressed. Instead, a second fast path read may be performed to obtain the corresponding checksum. Alternatively, or additionally, heuristics may be used to predict the odds of the data block being compressed. For example, when information encoded within a PVBN of the data block that identifies the PVBN as being within a compressed AZCS zone has shown to be sufficiently/insufficiently predictive of the data block being compressed, then a flag may be set to enable/disable fast path reads.

    Transitioning volumes between storage virtual machines
    12.
    发明授权
    Transitioning volumes between storage virtual machines 有权

    公开(公告)号：US10725806B2

    公开(公告)日：2020-07-28

    申请号：US15045179

    申请日：2016-02-16

    Applicant: NetApp, Inc.

    Inventor： Vani Vully ,  Avishek Chowdhury ,  Balaji Ramani

    IPC: G06F3/06 ,  G06F9/455 ,  G06F16/182 ,  G06F16/188

    Abstract: A volume rehost tool migrates a storage volume from a source virtual server within a distributed storage system to a destination storage server within the distributed storage system. The volume rehost tool can prevent client access to data on the volume through the source virtual server until the volume has been migrated to the destination virtual server. The tool identifies a set of storage objects associated with the volume, removes configuration information for the set of storage objects, and removes a volume record associated with the source virtual server for the volume. The tool can then create a new volume record associated with the destination virtual server, apply the configuration information for the set of storage objects to the destination virtual server, and allow client access to the data on the volume through the destination virtual server.

    Converting storage objects between formats in a copy-free transition
    15.
    发明授权
    Converting storage objects between formats in a copy-free transition 有权

    公开(公告)号：US11372807B2

    公开(公告)日：2022-06-28

    申请号：US16868700

    申请日：2020-05-07

    Applicant: NetApp Inc.

    Inventor： Vani Vully ,  Anil Thoppil ,  James Leong ,  Vitaly Revsin ,  Qinghua Zheng ,  Srishylam Simharajan

    IPC: G06F16/30 ,  G06F16/11

    Abstract: A copy-free transition tool converts storage objects from a source format associated with a source storage system to a destination format associated with a destination storage system. The transition tool exports configuration information associated with the source storage system to the destination storage system and brings the storage objects offline. Once the transition tool determines that the storage devices containing the storage objects are physically connected to the destination storage system, the tool can convert file systems from the source format to the destination format while leaving data and file layout unchanged. The tool can also modify metadata associated with each of the storage objects to conform to the destination format and store the modified metadata with the destination storage system.

    TRANSITIONING VOLUMES BETWEEN STORAGE VIRTUAL MACHINES
    16.
    发明申请
    TRANSITIONING VOLUMES BETWEEN STORAGE VIRTUAL MACHINES 审中-公开

    公开(公告)号：US20200319912A1

    公开(公告)日：2020-10-08

    申请号：US16908909

    申请日：2020-06-23

    Applicant: NetApp Inc.

    Inventor： Vani Vully ,  Avishek Chowdhury ,  Balaji Ramani

    IPC: G06F9/455 ,  G06F16/182 ,  G06F16/188 ,  G06F3/06

    Abstract: A volume rehost tool migrates a storage volume from a source virtual server within a distributed storage system to a destination storage server within the distributed storage system. The volume rehost tool can prevent client access to data on the volume through the source virtual server until the volume has been migrated to the destination virtual server. The tool identifies a set of storage objects associated with the volume, removes configuration information for the set of storage objects, and removes a volume record associated with the source virtual server for the volume. The tool can then create a new volume record associated with the destination virtual server, apply the configuration information for the set of storage objects to the destination virtual server, and allow client access to the data on the volume through the destination virtual server.

    CONVERTING STORAGE OBJECTS BETWEEN FORMATS IN A COPY-FREE TRANSITION
    17.
    发明申请
    CONVERTING STORAGE OBJECTS BETWEEN FORMATS IN A COPY-FREE TRANSITION 审中-公开

    公开(公告)号：US20170235802A1

    公开(公告)日：2017-08-17

    申请号：US15045193

    申请日：2016-02-16

    Applicant: NetApp, Inc.

    Inventor： Vani Vully ,  Anil Thoppil ,  James Leong ,  Vitaly Revsin ,  Qinghua Zheng ,  Srishylam Simharajan

    IPC: G06F17/30

    CPC classification number: G06F16/119

    Abstract: A copy-free transition tool converts storage objects from a source format associated with a source storage system to a destination format associated with a destination storage system. The transition tool exports configuration information associated with the source storage system to the destination storage system and brings the storage objects offline. Once the transition tool determines that the storage devices containing the storage objects are physically connected to the destination storage system, the tool can convert file systems from the source format to the destination format while leaving data and file layout unchanged. The tool can also modify metadata associated with each of the storage objects to conform to the destination format and store the modified metadata with the destination storage system.

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