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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
Inventor： Dirk Thomsen , Thorsten Glebe , Tobias Scheuer , Werner Thesing , Johannes Gloeckle
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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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
Inventor： Dirk Thomsen , Thorsten Glebe , Tobias Scheuer , Werner Thesing , Johannes Gloeckle
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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