Invention Grant
- Patent Title: Fair prefetching in hybrid column stores
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Application No.: US16850310Application Date: 2020-04-16
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Publication No.: US11442862B2Publication Date: 2022-09-13
- Inventor: Robert Schulze , Adrian Dragusanu , Anup Ghatage , Colin Florendo , Mihnea Andrei , Randall Hammon , Sarika Iyer , Simhachala Sasikanth Gottapu , Yanhong Wang
- Applicant: SAP SE
- Applicant Address: DE Walldorf
- Assignee: SAP SE
- Current Assignee: SAP SE
- Current Assignee Address: DE Walldorf
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: G06F12/08
- IPC: G06F12/08 ; G06F12/0862 ; G06F12/0882 ; G06F16/24 ; G06F16/22

Abstract:
Disclosed herein are system, method, and computer program product embodiments for performing fair prefetching. An embodiment operates by splitting a data vector into a first subrange and a second subrange. The embodiment performs a first chance prefetch operation on the first subrange based on a fixed number of pages, thereby loading a set of pages of the first subrange into a main memory. The embodiment performs the first chance prefetch operation on the second subrange based on the fixed number of pages, thereby loading a first set of pages of the second subrange into the main memory. The embodiment performs a second chance prefetch operation on the second subrange based on the performing the first chance prefetch operation on the second subrange, thereby loading a second set of pages of the second subrange into the main memory. The embodiment then executes the query.
Public/Granted literature
- US20210326263A1 Fair Prefetching in Hybrid Column Stores Public/Granted day:2021-10-21
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