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    N-way merge technique for updating volume metadata in a storage I/O stack
    283.
    发明授权
    N-way merge technique for updating volume metadata in a storage I/O stack 有权

    公开(公告)号：US10365838B2

    公开(公告)日：2019-07-30

    申请号：US15820004

    申请日：2017-11-21

    Applicant: NetApp, Inc.

    Inventor： Janice D'Sa ,  Ling Zheng ,  Blake H. Lewis

    IPC: G06F3/06 ,  H04L29/08

    Abstract: A N-way merge technique efficiently updates metadata in accordance with a N-way merge operation managed by a volume layer of a storage input/output (I/O) stack executing on one or more nodes of a cluster. The metadata is embodied as mappings from logical block addresses (LBAs) of a logical unit (LUN) accessible by a host to durable extent keys, and is organized as a multi-level dense tree. The mappings are organized such that a higher level of the dense tree contains more recent mappings than a next lower level, i.e., the level immediately below. The N-way merge operation is an efficient (i.e., optimized) way of updating the volume metadata mappings of the dense tree by merging the mapping content of all three levels in a single iteration, as opposed to merging the content of the first level with the content of the second level in a first iteration of a two-way merge operation and then merging the results of the first iteration with the content of the third level in a second iteration of the operation.

    Secure data replication
    284.
    发明授权
    Secure data replication 有权

    公开(公告)号：US10360237B2

    公开(公告)日：2019-07-23

    申请号：US15820979

    申请日：2017-11-22

    Applicant: NetApp Inc.

    Inventor： Vijay M. Deshmukh ,  Pranab Patnaik ,  Uday Madhav Joshi ,  Kiyoshi James Komatsu

    IPC: G06F3/06 ,  G06F16/27 ,  G06F21/60 ,  G06F21/62 ,  H04L29/06 ,  H04L29/08

    Abstract: One or more techniques and/or computing devices are provided for secure data replication. For example, a first storage controller may host first storage within which storage resources (e.g., files, logical unit numbers (LUNs), volumes, etc.) are stored. The first storage controller may establish an access policy with a001 second storage controller to which data is to be replicated from the first storage. The access policy may define an authentication mechanism for the first storage controller to authenticate the second storage controller, an authorization mechanism specifying a type of access that the second storage controller has for a storage resource, and an access control mechanism specifying how the second storage controller's access to data of the storage resource is to be controlled. In this way, data replication requests may be authenticated and authorized so that data may be provided, according to the access control mechanism, in a secure manner.

    Data recovery in a distributed storage system
    285.
    发明授权
    Data recovery in a distributed storage system 有权

    公开(公告)号：US10360119B2

    公开(公告)日：2019-07-23

    申请号：US14876063

    申请日：2015-10-06

    Applicant: NetApp, Inc.

    Inventor： Martin Jess ,  Joseph Moore ,  Ziling Huang

    IPC: G06F11/10 ,  G06F11/20

    Abstract: A system, method, and machine-readable storage medium for recovering data in a distributed storage system are provided. In some embodiments, the method includes identifying a failing storage device of a first storage node having an inaccessible data segment. When it is determined that the inaccessible data segment cannot be recovered using a first data protection scheme, a first chunk of data associated with the inaccessible data segment is identified and a group associated with the first chunk of data is identified. A second chunk of data associated with the group is selectively retrieved from a second storage node such that data associated with an accessible data segment of the first storage node is not retrieved. The inaccessible data segment is recovered by recovering the first chunk of data using a second data protection scheme and the second chunk of data.

    Efficient recovery of erasure coded data
    287.
    发明授权
    Efficient recovery of erasure coded data 有权

    公开(公告)号：US10353740B2

    公开(公告)日：2019-07-16

    申请号：US15589909

    申请日：2017-05-08

    Applicant: NetApp, Inc.

    Inventor： Emalayan Vairavanathan ,  Dheeraj Raghavender Sangamkar ,  Song Guen Yoon ,  Yi Zhang

    IPC: G06F9/50 ,  G06F11/20 ,  G06F11/10 ,  G06F3/06 ,  H04L29/08 ,  H04L29/14

    Abstract: To efficiently recover from a multiple storage node failure, a storage node concurrently restores data fragments to the multiple failed storage nodes, as opposed to restoring each node individually. In the VCS based storage technique, storage nodes are restored as part of an ECG repair process. For each ECG being repaired, a storage node performing the restoration process reads data fragments from active nodes in the ECG and generates new data fragments to replace any lost data fragments. The node then stores one of the new data fragments across each of the failed storage nodes. By concurrently restoring data fragments to each failed storage node, the data fragments needed to repair each ECG are only read once, thereby preserving disk operations and network bandwidth.

    Selectively improving RAID operations latency
    288.
    发明授权
    Selectively improving RAID operations latency 有权

    公开(公告)号：US10353642B2

    公开(公告)日：2019-07-16

    申请号：US15583946

    申请日：2017-05-01

    Applicant: NetApp, Inc.

    Inventor： Ratnesh Gupta

    IPC: G06F11/00 ,  G06F3/06 ,  G06F11/10

    Abstract: Presented herein are methods, non-transitory computer readable media, and devices for selectively limiting the amount of data in a file system, which include: determining a reparity bit value for a write disk block range, wherein the reparity bit is configured to track a number of writes in progress to a stripe range; determining the reparity bit value; updating a threshold written disk block number as a highest disk block number of the reparity bit value; and initiating a RAID operation until it reaches the threshold written disk block number, wherein the threshold written disk block number comprises a maximum written disk block number representing the last disk block number written.

    Methods and systems for selecting compatible resources in networked storage environments
    289.
    发明授权
    Methods and systems for selecting compatible resources in networked storage environments 有权

    公开(公告)号：US10348562B2

    公开(公告)日：2019-07-09

    申请号：US14992249

    申请日：2016-01-11

    Applicant: NETAPP, INC.

    Inventor： Karthick Radhakrishnan ,  Jacob Abraham ,  Krithi BG ,  Nirdosh Kumar Chouhan

    IPC: H04L12/24 ,  H04L29/08

    Abstract: Methods and systems for a networked storage environment are provided. One method includes storing at a storage device by a processor a data structure with information regarding a plurality of compatible software and hardware components configured to operate in a plurality of configurations as part of a storage solution for using resources at a networked storage environment for storing data; obtaining by a processor executable configuration advisor information regarding a plurality of deployed components of a deployed configuration from among the plurality of configurations; comparing the deployed configuration with a latest configuration having the plurality of deployed components from among the plurality of configurations stored at the data structure; and recommending a change in at least one of the plurality of deployed components to upgrade the deployed configuration, when the deployed configuration is not the latest configuration.

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