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    PERSISTENT KEY-VALUE STORE AND JOURNALING SYSTEM
    12.
    发明公开
    PERSISTENT KEY-VALUE STORE AND JOURNALING SYSTEM 审中-公开

    公开(公告)号：US20230195622A1

    公开(公告)日：2023-06-22

    申请号：US17553930

    申请日：2021-12-17

    Applicant: NetApp Inc.

    Inventor： Sudheer Kumar Vavilapalli ,  Asif Imtiyaz Pathan ,  Parag Sarfare ,  Nikhil Mattankot ,  Stephen Wu ,  Amit Borase

    IPC: G06F12/0802 ,  G06F3/06

    CPC classification number: G06F12/0802 ,  G06F3/0653 ,  G06F3/0619 ,  G06F3/0673 ,  G06F2212/60

    Abstract: Techniques are provided for implementing a persistent key-value store for caching client data, journaling, and/or crash recovery. The persistent key-value store may be hosted as a primary cache that provides read and write access to key-value record pairs stored within the persistent key-value store. The key-value record pairs are stored within multiple chains in the persistent key-value store. Journaling is provided for the persistent key-value store such that incoming key-value record pairs are stored within active chains, and data within frozen chains is written in a distributed manner across distributed storage of a distributed cluster of nodes. If there is a failure within the distributed cluster of nodes, then the persistent key-value store may be reconstructed and used for crash recovery.

    Network storage failover systems and associated methods
    13.
    发明授权
    Network storage failover systems and associated methods 有权

    公开(公告)号：US11269744B2

    公开(公告)日：2022-03-08

    申请号：US16855837

    申请日：2020-04-22

    Applicant: NETAPP, INC.

    Inventor： Parag Sarfare ,  Ananthan Subramanian ,  Szu-Wen Kuo ,  Asif Imtiyaz Pathan ,  Santhosh Selvaraj ,  Nikhil Mattankot ,  Manan Patel ,  Travis Ryan Grusecki

    IPC: G06F11/20 ,  G06F11/14

    Abstract: Failover methods and systems for a networked storage environment are provided. A filtering data structure and a metadata data structure are generated before starting a replay of a log stored in a non-volatile memory of a second storage node, during a failover operation initiated in response to a failure at a first storage node. The second storage node operates as a partner node of the first storage node to mirror at the log one or more write requests received by the first storage node prior to the failure, and data associated with the one or more write requests. The filtering data structure identifies each log entry and the metadata structure stores a metadata attribute of each log entry. The filtering data structure and the metadata structure are used for providing access to a logical storage object during the log replay from the second storage node.

    NETWORK STORAGE FAILOVER SYSTEMS AND ASSOCIATED METHODS
    14.
    发明申请
    NETWORK STORAGE FAILOVER SYSTEMS AND ASSOCIATED METHODS 有权

    公开(公告)号：US20210334182A1

    公开(公告)日：2021-10-28

    申请号：US16855853

    申请日：2020-04-22

    Applicant: NETAPP, INC.

    Inventor： Szu-Wen Kuo ,  Parag Sarfare ,  Ananthan Subramanian ,  Asif Imtiyaz Pathan ,  Santhosh Selvaraj ,  Nikhil Mattankot

    IPC: G06F11/20 ,  H04L29/08 ,  H04L12/24 ,  H04L12/879

    Abstract: Failover methods and systems for a networked storage environment are provided. A metadata data structure is generated, before starting a replay of entries at a log stored in a non-volatile memory of a second storage node, during a failover operation initiated in response to a failure at a first storage node. The second storage node operates as a partner node of the first storage node, and the metadata structure stores a metadata attribute of each log entry. Furthermore, the metadata attribute of each log entry is persistently stored. The persistently stored metadata attribute is used to respond to a read request received during the replay by the second storage node, while a write request metadata attribute of a write request is used for executing the write request received by the second storage node during the replay.

    NETWORK STORAGE FAILOVER SYSTEMS AND ASSOCIATED METHODS
    15.
    发明申请
    NETWORK STORAGE FAILOVER SYSTEMS AND ASSOCIATED METHODS 有权

    公开(公告)号：US20210334180A1

    公开(公告)日：2021-10-28

    申请号：US16855870

    申请日：2020-04-22

    Applicant: NETAPP, INC.

    Inventor： Asif Imtiyaz Pathan ,  Parag Sarfare ,  Ananthan Subramanian ,  Szu-Wen Kuo ,  Santhosh Selvaraj ,  Nikhil Mattankot

    IPC: G06F11/20 ,  G06F11/14 ,  G06F11/07 ,  G06F11/30 ,  G06F16/17 ,  G06F16/182

    Abstract: Failover methods and systems for a networked storage environment are provided. In one aspect, a read request associated with a first storage object is received, during a replay of entries of a log stored in a non-volatile memory of a second storage node for a failover operation initiated in response to a failure at a first storage node. The second storage node operates as a partner node of the first storage node. The read request is processed using a filtering data structure that is generated from the log prior to the replay and identifies each log entry. The read request is processed when the log does not have an entry associated with the read request, and when the filtering data structure includes an entry associated with the read request, the requested data is located at the non-volatile memory.

    Deferred replication of recovery information at site switchover
    17.
    发明授权
    Deferred replication of recovery information at site switchover 有权
    在站点切换时延迟恢复恢复信息

    公开(公告)号：US09280430B2

    公开(公告)日：2016-03-08

    申请号：US14276375

    申请日：2014-05-13

    Applicant: NetApp, Inc.

    Inventor： Parag Sarfare ,  Yong Cho ,  Tabriz Holtz ,  Anuja Jaiswal

    IPC: G06F11/00 ,  G06F11/20 ,  H04L29/08

    CPC classification number: G06F11/2069 ,  G06F11/1662 ,  G06F11/2023 ,  G06F11/2033 ,  G06F11/2035 ,  G06F11/2046 ,  G06F11/2048 ,  G06F11/2053 ,  G06F11/2056 ,  G06F11/2097 ,  G06F2201/82 ,  H04L67/1095 ,  H04L67/1097 ,  H04L69/40

    Abstract: Methods, systems, and computer program products for providing deferred replication of recovery information at site switchover are disclosed. A computer-implemented method may include receiving a first copy of logged data for storage volumes of a disaster recovery (DR) partner at a remote site from the DR partner, receiving a request to perform a site switchover from the remote site to the local site, receiving a second copy of logged data for the storage volumes from a local high availability (HA) partner in response to the switchover, and recovering the storage volumes locally by applying one or more of the copies of logged data to corresponding mirrored storage volumes at the local site.

    Abstract translation: 公开了用于在现场切换时提供恢复信息的延迟复制的方法，系统和计算机程序产品。 计算机实现的方法可以包括接收来自DR合作伙伴的远程站点处的灾难恢复（DR）伙伴的存储卷的记录数据的第一副本，接收执行从远程站点到本地站点的站点切换的请求 响应切换从本地高可用性（HA）合作伙伴接收用于存储卷的记录数据的第二副本，以及通过将一个或多个记录数据副本应用于相应的镜像存储卷来本地地恢复存储卷 当地网站。

    PERSISTENT KEY-VALUE STORE AND JOURNALING SYSTEM
    18.
    发明公开
    PERSISTENT KEY-VALUE STORE AND JOURNALING SYSTEM 审中-公开

    公开(公告)号：US20240232080A1

    公开(公告)日：2024-07-11

    申请号：US18615014

    申请日：2024-03-25

    Applicant: NetApp, Inc.

    Inventor： Sudheer Kumar Vavilapalli ,  Asif Imtiyaz Pathan ,  Parag Sarfare ,  Nikhil Mattankot ,  Stephen Wu ,  Amit Borase

    IPC: G06F12/0802 ,  G06F3/06

    CPC classification number: G06F12/0802 ,  G06F3/0619 ,  G06F3/0653 ,  G06F3/0673 ,  G06F2212/60

    Abstract: Techniques are provided for implementing a persistent key-value store for caching client data, journaling, and/or crash recovery. The persistent key-value store may be hosted as a primary cache that provides read and write access to key-value record pairs stored within the persistent key-value store. The key-value record pairs are stored within multiple chains in the persistent key-value store. Journaling is provided for the persistent key-value store such that incoming key-value record pairs are stored within active chains, and data within frozen chains is written in a distributed manner across distributed storage of a distributed cluster of nodes. If there is a failure within the distributed cluster of nodes, then the persistent key-value store may be reconstructed and used for crash recovery.

    CO-LOCATED JOURNALING AND DATA STORAGE FOR WRITE REQUESTS
    20.
    发明申请
    CO-LOCATED JOURNALING AND DATA STORAGE FOR WRITE REQUESTS 有权

    公开(公告)号：US20220342577A1

    公开(公告)日：2022-10-27

    申请号：US17849290

    申请日：2022-06-24

    Applicant: NetApp, Inc.

    Inventor： Kevin Daniel Varghese ,  Ananthan Subramanian ,  Parag Sarfare ,  Sandeep Yadav ,  Suhas Urkude ,  Rajesh Khandelwal

    IPC: G06F3/06

    Abstract: A method and system for co-locating journaling and data storage based on write requests. A write request that includes metadata and data is received from a client. A logical storage unit for storing the metadata and the data is identified. The logical storage unit is divided into a journal partition and a volume partition. The journal partition includes a first log and a second log. Which of the first log and the second log is an active log and which of the first log and the second log is an inactive log are identified. The metadata is recorded in a first location in the active log and the data is recorded in a second location in the active log during a single I/O operation. A reply is sent to the client after the metadata and the data are recorded in the journal partition.

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