PARALLEL LOAD OF MAPPING CONTAINERS FOR DATABASE SYSTEM START AND RESTART OPERATIONS

    公开(公告)号:US20210373893A1

    公开(公告)日:2021-12-02

    申请号:US16883241

    申请日:2020-05-26

    Applicant: SAP SE

    Abstract: Aspects of the current subject matter are directed to an approach in which a parallel load operation of file ID mapping containers is accomplished at start and/or restart of a database system. Parallel load operation of file ID mapping and/or large binary object (LOB) file ID mapping is done among a plurality of scanning engines into a plurality of data buffers that are associated with each of the plurality of scanning engines. Each scanning engine operates on a certain path of a page chain of a page structure including the mapping, causing the page chain to be split among scanning engines to process maps. Contents of the data buffers are pushed to mapping engines via a queue. The mapping engines load the file ID mapping and the LOB file ID mapping into maps for in-system access.

    Parallel load of mapping containers for database system start and restart operations

    公开(公告)号:US11429388B2

    公开(公告)日:2022-08-30

    申请号:US16883241

    申请日:2020-05-26

    Applicant: SAP SE

    Abstract: Aspects of the current subject matter are directed to an approach in which a parallel load operation of file ID mapping containers is accomplished at start and/or restart of a database system. Parallel load operation of file ID mapping and/or large binary object (LOB) file ID mapping is done among a plurality of scanning engines into a plurality of data buffers that are associated with each of the plurality of scanning engines. Each scanning engine operates on a certain path of a page chain of a page structure including the mapping, causing the page chain to be split among scanning engines to process maps. Contents of the data buffers are pushed to mapping engines via a queue. The mapping engines load the file ID mapping and the LOB file ID mapping into maps for in-system access.

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