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    Compound partition and clustering keys
    41.
    发明授权
    Compound partition and clustering keys 有权

    公开(公告)号：US11036762B1

    公开(公告)日：2021-06-15

    申请号：US16698417

    申请日：2019-11-27

    Applicant: Amazon Technologies, Inc.

    Inventor： Lewis Bruck ,  Aishwarya Kamal ,  Almero Gouws ,  Derek William Richard Chen-Becker ,  Haifeng He ,  Andrey Markin ,  Akshat Vig

    IPC: G06F16/00 ,  G06F16/27 ,  G06F21/62 ,  G06F16/25 ,  G06F16/28

    Abstract: A data storage service implements encoding techniques for generating compound partition keys, compound clustering keys, or a combination for more flexibility in storing data in a key-value database system. In some aspects a request to store data with multiple partition keys and/or multiple clustering keys may be received. Length information may be added to the partition keys, and the results concatenated together to form a compound partition key used to store the data in the database. Ordering information may be added to the clustering keys, and the results concatenated together to form a compound clustering key, to be used in storing and sorting data in the database. In some cases, the clustering keys may be made a uniform length, such as by padding keys, as necessary, to have a length that is a multiple of an arbitrary number, and then dividing the clustering keys into chunks of that arbitrary number.

    CONTINUOUS DATA PROTECTION
    46.
    发明公开
    CONTINUOUS DATA PROTECTION 审中-公开

    公开(公告)号：US20240160531A1

    公开(公告)日：2024-05-16

    申请号：US18510518

    申请日：2023-11-15

    Applicant: Amazon Technologies, Inc.

    Inventor： Akshat Vig ,  Tate Andrew Certain ,  Go Hori

    IPC: G06F11/14 ,  G06F9/54 ,  G06F16/23 ,  G06F16/27

    CPC classification number: G06F11/1451 ,  G06F9/54 ,  G06F11/1469 ,  G06F16/2358 ,  G06F16/278 ,  G06F2201/84

    Abstract: Changes made to a database table are accumulated, in durable storage, and snapshots of partitions of the table are obtained. For successive snapshots of a partition, the system accesses a previous snapshot, applies changes from the accumulated changes, and stores the updated snapshot to a durable data store. The accumulated changes and the successive partition snapshots are made available to restore the database to any point in time across a continuum between successive snapshots. Although each partition of the table may have a backup snapshot that was generated at a time different from when other partition snapshots were generated, changes from respective change logs may be selectively log-applied to distinct partitions of a table to generate an on-demand backup of the entire table at common point-in-time across partitions. Point-in-time restores of a table may rely upon a similar process to coalesce partition snapshots that are not aligned in time.

    Mixed-mode replication for sharded database systems
    47.
    发明授权
    Mixed-mode replication for sharded database systems 有权

    公开(公告)号：US11809404B1

    公开(公告)日：2023-11-07

    申请号：US17038544

    申请日：2020-09-30

    Applicant: Amazon Technologies, Inc.

    Inventor： Akhilesh Mritunjai ,  Akshat Vig ,  Craig Wesley Howard ,  Hao He

    IPC: G06F16/23 ,  H04L67/1021 ,  G06F16/27

    CPC classification number: G06F16/2365 ,  G06F16/2358 ,  G06F16/278 ,  H04L67/1021

    Abstract: Techniques are described for enabling a database service to provide a zonal consistency model for read and write operations involving database tables replicated across a plurality of availability zones of a cloud provider network according to some embodiments. A database service routes zonally consistent operations to request routers and storage nodes that are located in a same availability zone as the client device from which the request originates. For example, in contrast to standard write operations and strongly consistent read operations, which are processed by a leader storage node that may be located in a different availability zone than the originating request, zonally consistent operations can be processed by any storage node and, in particular, by a storage node in a same availability zone as the originating client device.

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