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    Distributed database exception handling
    34.
    发明授权
    Distributed database exception handling 有权

    公开(公告)号：US11385948B1

    公开(公告)日：2022-07-12

    申请号：US16698491

    申请日：2019-11-27

    Applicant: Amazon Technologies, Inc.

    Inventor： Danielle Livneh ,  Almero Gouws ,  Derek William Richard Chen-Becker ,  Stefano Stefani ,  Akshat Vig ,  Zoe Wheeler ,  Lakshmi Narasimha Guptha Munuhur Rajagopal

    IPC: G06F11/00 ,  G06F11/07 ,  G06F16/27

    Abstract: A distributed database system maintains data for a database client by storing data on a plurality of storage nodes. Upon receiving a request from the database client in a first format, the database system translates the request to a second format and sends the translated request to a storage subsystem. The storage subsystem generates an exception if the translated request cannot be successfully completed. The distributed database system resends the translated request on behalf of the database client if the exception corresponds to a request that can be retried, and continues to resend the translated request until a first of an expiration of a predetermined time period or until the request completes successfully. The distributed database system sends a response to the database client based on the resent database request.

    PAST-STATE BACKUP GENERATOR AND INTERFACE FOR DATABASE SYSTEMS
    36.
    发明申请
    PAST-STATE BACKUP GENERATOR AND INTERFACE FOR DATABASE SYSTEMS 有权

    公开(公告)号：US20220004462A1

    公开(公告)日：2022-01-06

    申请号：US17478162

    申请日：2021-09-17

    Applicant: Amazon Technologies, Inc.

    Inventor： Akshat Vig ,  Tate A. Certain ,  Nicholas Gordon ,  Go Hori

    IPC: G06F11/14 ,  G06F16/27

    Abstract: An interface for requesting, and technique for generation of, a backup of a past state of a database table are provided. Changes made to a database table are accumulated, in durable storage, and snapshots of partitions of the table are obtained. The accumulated changes and the successive partition snapshots are used to generate a past state of the database at any point in time across a continuum between successive snapshots. Although each partition of the table may have a 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 backup in the past of the entire table at common point-in-time across partitions.

    Continuous data protection and restoration
    38.
    发明授权
    Continuous data protection and restoration 有权

    公开(公告)号：US11042503B1

    公开(公告)日：2021-06-22

    申请号：US15920193

    申请日：2018-03-13

    Applicant: Amazon Technologies, Inc.

    Inventor： Akshat Vig ,  Go Hori ,  Tate Andrew Certain

    IPC: G06F16/11 ,  G06F11/14

    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.

    Compound partition and clustering keys
    39.
    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.

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