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    Metadata management for a transactional storage system
    4.
    发明授权
    Metadata management for a transactional storage system 有权

    公开(公告)号：US11762868B2

    公开(公告)日：2023-09-19

    申请号：US17445422

    申请日：2021-08-19

    Applicant: Google LLC

    Inventor： Pavan Edara ,  Yi Yang

    IPC: G06F16/24 ,  G06F16/245 ,  G06F16/2458 ,  G06F16/2455

    CPC classification number: G06F16/2477 ,  G06F16/24558

    Abstract: A method for managing metadata for a transactional storage system include receiving a query request at a snapshot timestamp. The query request requests return of at least one data block from a plurality of data blocks. Each data block includes a corresponding write epoch timestamp and a corresponding conversion indicator indicating whether the data block is active or has been converted at a respective conversion timestamp. The method also includes setting a read epoch timestamp equal to the earliest one of the write epoch and determining whether any of the respective conversion timestamps occurring at or before the snapshot timestamp occur after the read epoch timestamp. The method also includes determining the at least one data block requested by the query request by scanning each of the data blocks including corresponding write epoch timestamps occurring at or after the read epoch timestamp.

    Scalable exactly-once data processing using transactional streaming writes
    7.
    发明授权
    Scalable exactly-once data processing using transactional streaming writes 有权

    公开(公告)号：US11573876B2

    公开(公告)日：2023-02-07

    申请号：US17085576

    申请日：2020-10-30

    Applicant: Google LLC

    Inventor： Pavan Edara ,  Reuven Lax ,  Yi Yang ,  Gurpreet Singh Nanda

    IPC: G06F11/14 ,  G06F11/30 ,  G06F9/30 ,  G06F9/46 ,  G06F11/07 ,  G06F12/02

    Abstract: A method for processing data exactly once using transactional stream writes includes receiving, from a client, a batch of data blocks for storage on memory hardware in communication with the data processing hardware. The batch of data blocks is associated with a corresponding sequence number and represents a number of rows of a table stored on the memory hardware. The method also includes partitioning the batch of data blocks into a plurality of sub-batches of data blocks. For each sub-batch of data blocks, the method further includes assigning the sub-batch of data blocks to a buffered stream; writing, using the assigned buffered stream, the sub-batch of data blocks to the memory hardware; updating a storage log with an intent to commit the sub-batch of data blocks using the assigned buffered stream; and committing the sub-batch of data blocks to the memory hardware.

    Scalable Exactly-Once Data Processing Using Transactional Streaming Writes
    9.
    发明申请
    Scalable Exactly-Once Data Processing Using Transactional Streaming Writes 有权

    公开(公告)号：US20220138071A1

    公开(公告)日：2022-05-05

    申请号：US17085576

    申请日：2020-10-30

    Applicant: Google LLC

    Inventor： Pavan Edara ,  Reuven Lax ,  Yi Yang ,  Gurpreet Singh Nanda

    IPC: G06F11/30 ,  G06F11/07 ,  G06F12/02 ,  G06F9/30 ,  G06F9/46

    Abstract: A method for processing data exactly once using transactional stream writes includes receiving, from a client, a batch of data blocks for storage on memory hardware in communication with the data processing hardware. The batch of data blocks is associated with a corresponding sequence number and represents a number of rows of a table stored on the memory hardware. The method also includes partitioning the batch of data blocks into a plurality of sub-batches of data blocks. For each sub-batch of data blocks, the method further includes assigning the sub-batch of data blocks to a buffered stream; writing, using the assigned buffered stream, the sub-batch of data blocks to the memory hardware; updating a storage log with an intent to commit the sub-batch of data blocks using the assigned buffered stream; and committing the sub-batch of data blocks to the memory hardware.

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