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    CROSS-PLATFORM REPLICATION
    23.
    发明申请
    CROSS-PLATFORM REPLICATION 有权

    公开(公告)号：US20220292005A1

    公开(公告)日：2022-09-15

    申请号：US17828900

    申请日：2022-05-31

    Applicant: NetApp Inc.

    Inventor： Atul Ramesh Pandit ,  Vijay M. Deshmukh ,  Michael Lee Federwisch ,  Ling Zheng ,  Kiyoshi James Komatsu ,  Rachita Kothiyal

    IPC: G06F11/20 ,  H04L67/1095 ,  H04L67/1097

    Abstract: One or more techniques and/or computing devices are provided for cross-platform replication. For example, a replication relationship may be established between a first storage endpoint and a second storage endpoint, where at least one of the storage endpoints, such as the first storage endpoint, lacks or has incompatible functionality to perform and manage replication because the storage endpoints have different storage platforms that store data differently, use different control operations and interfaces, etc. Accordingly, replication destination workflow, replication source workflow, and/or a proxy representing the first storage endpoint may be implemented at the second storage endpoint comprising the replication functionality. In this way, replication, such as snapshot replication, may be implemented between the storage endpoints by the second storage endpoint using the replication destination workflow, the replication source workflow, and/or the proxy that either locally executes tasks or routes tasks to the first storage endpoint such as for data access.

    Managing Volume Snapshots in the Cloud
    24.
    发明申请
    Managing Volume Snapshots in the Cloud 有权

    公开(公告)号：US20210406216A1

    公开(公告)日：2021-12-30

    申请号：US17039931

    申请日：2020-09-30

    Applicant: NetApp, Inc.

    Inventor： Kiyoshi Komatsu ,  Ardalan Kangarlou ,  Richard Swift ,  Rajesh Rajaraman ,  Ling Zheng

    IPC: G06F16/11 ,  G06F16/16 ,  G06F16/182 ,  G06F12/02 ,  G06F11/14

    Abstract: Systems, methods, and machine-readable media for creating, deleting, and restoring volume snapshots in a remote data store are disclosed. A storage volume and a storage operating system are implemented in a software container. Through a user interface, a user may create a snapshot of the volume to a cloud storage. A user may also delete individual snapshots from the cloud storage. Further, deletion of a most recent snapshot may occur by awaiting deletion (though marking as deleted to the user) until a next snapshot is received. Snapshots in the cloud storage are manipulatable even after destruction of the source volume (by destruction of the container, for example). A controller outside the container is used by implementing the same API as the controller in the container had. Full restores of snapshots in the cloud are also possible even when the original container and volume have been destroyed.

    Technique for preserving efficiency for replication between clusters of a network
    26.
    发明授权
    Technique for preserving efficiency for replication between clusters of a network 有权

    公开(公告)号：US10565230B2

    公开(公告)日：2020-02-18

    申请号：US14876460

    申请日：2015-10-06

    Applicant: NetApp, Inc.

    Inventor： Ling Zheng ,  Michael L. Federwisch ,  Blake H. Lewis

    IPC: G06F16/27 ,  G06F16/11 ,  G06F16/28 ,  G06F16/2457

    Abstract: A technique preserves efficiency for replication of data between a source node of a source cluster (“source”) and a destination node of a destination cluster (“destination”) of a clustered network. Replication in the clustered network may be effected by leveraging global in-line deduplication at the source to identify and avoid copying duplicate data from the source to the destination. To ensure that the copy of the data on the destination is synchronized with the data received at the source, the source creates a snapshot of the data for use as a baseline copy at the destination. Thereafter, new data received at the source that differs from the baseline snapshot are transmitted and copied to the destination. In addition, the source and destination nodes negotiate to establish a mapping of name-to-data when transferring data (i.e., an extent) between the clusters. Illustratively, the name is an extent key for the extent, such that the negotiated mapping established by the source and destination is based on the extent key associated with the extent.

    High performance and memory efficient metadata caching
    27.
    发明授权
    High performance and memory efficient metadata caching 有权

    公开(公告)号：US10108547B2

    公开(公告)日：2018-10-23

    申请号：US14989392

    申请日：2016-01-06

    Applicant: NetApp, Inc.

    Inventor： Anshul Pundir ,  Ashwin Pednekar ,  Ling Zheng ,  Michael L. Federwisch

    IPC: G06F12/12 ,  G06F12/0817 ,  G06F12/0868 ,  G06F12/122 ,  G06F12/123 ,  G06F12/128

    Abstract: A technique provides memory efficient caching of metadata managed by a volume layer of a storage input/output stack executing on one or more nodes of a cluster. Efficient caching of the metadata in a memory of a node may be realized through the use of a caching data structure, i.e., a page cache, configured to store a key-value pair, wherein the key is an extent key and the value is a metadata page containing the index entries. The page cache illustratively includes two data structures configured to maintain the properties of Least Recently Used (LRU) and Least Frequently Used (LFU) for the cache. The first data structure is a hash table that stores a dense tree metadata page (value) indexed by the extent key. The second data structure is a recycle queue that controls the metadata page stored in the hash table based on spatial and temporal locality of the page.

    SNAPSHOT METADATA ARRANGEMENT FOR EFFICIENT CLOUD INTEGRATED DATA MANAGEMENT
    29.
    发明申请
    SNAPSHOT METADATA ARRANGEMENT FOR EFFICIENT CLOUD INTEGRATED DATA MANAGEMENT 审中-公开

    公开(公告)号：US20180121453A1

    公开(公告)日：2018-05-03

    申请号：US15338219

    申请日：2016-10-28

    Applicant: NetApp, Inc.

    Inventor： Sharad Jain ,  Hrishikesh Ashok Tapaswi ,  Ling Zheng ,  Onkar Bhat ,  Akhil Kaushik

    IPC: G06F17/30 ,  G06F11/14

    Abstract: A storage appliance arranges snapshot data and snapshot metadata into different structures, and arranges the snapshot metadata to facilitate efficient snapshot manipulation, which may be for snapshot management or snapshot restore. The storage appliance receives snapshots according to a forever incremental configuration and arranges snapshot metadata into different types of records. The storage appliance stores these records in key-value stores maintained for each defined data collection (e.g., volume). The storage appliance arranges the snapshot metadata into records for inode information, records for directory information, and records that map source descriptors of data blocks to snapshot file descriptors. The storage appliance uses a locally generated snapshot identifier as a key prefix for the records to conform to a sort constrain of the key-value store, which allows the efficiency of the key-value store to be leveraged. The snapshot metadata arrangement facilitates efficient snapshot restore, file restore, and snapshot reclamation.

    Consistency group management
    30.
    发明授权
    Consistency group management 有权

    公开(公告)号：US09952767B2

    公开(公告)日：2018-04-24

    申请号：US15142767

    申请日：2016-04-29

    Applicant: NetApp, Inc.

    Inventor： Ling Zheng ,  Ning Zhao ,  Radek Aster ,  Jeffrey S. Kimmel

    IPC: G06F3/06

    CPC classification number: G06F3/0604 ,  G06F3/0617 ,  G06F3/065 ,  G06F3/0656 ,  G06F3/067 ,  G06F11/20

    Abstract: A consistency group is used as a basic unit of data management of storage containers served by a storage input/output (I/O) stack executing on one or more nodes of a cluster. The storage container may be a LUN embodied as parent volume (active volume), a snapshot (represented as an independent volume embodied as read-only copy of the active volume), and a clone (represented as another independent volume embodied as a read-write copy (clone) of the active volume). A consistency group (CG) is a set (i.e., collection) of objects, e.g., LUNs or other CGs (nested CG), which may be managed and operated upon collectively by an administrative command via a Storage Area Network administration layer (SAL) of the storage I/O stack. The SAL may interact with one or more layers of the storage I/O stack to (i) create a clone of a set of object members of the CG; (ii) create one or more snapshots of the set of object members of the CG; (iii) restore the set of object members of the CG from a group of CG snapshots; (iv) replicate the set of object members of the CG as a single entity; and (v) delete a CG and a nested CG according to specific semantics.

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