公开(公告)号：US11080271B2

公开(公告)日：2021-08-03

申请号：US15261582

申请日：2016-09-09

Applicant: SAP SE

Inventor： Juchang Lee ,  Chang Gyoo Park ,  Francis Gropengiesser ,  Anil Kumar Goel ,  Deok Koo Kim ,  SunHo Lee

IPC: G06F16/23 ,  G06F9/46

Abstract: A transaction management service layer monitors a plurality of read and write transactions being executed by the data engines by way of client libraries at each of a plurality of data engines. In addition, the transaction management server layer maintains and coordinates transaction timestamp and sequence numbers that are shared by the plurality of data engines. The transaction management service layer identifies and resolves conflicts among the plurality of transactions. The transaction management service layer is a separate and independent service that is isolated from other components of the plurality of data engines. Related apparatus, systems, techniques and articles are also described.

公开(公告)号：US20180075083A1

公开(公告)日：2018-03-15

申请号：US15261582

申请日：2016-09-09

Applicant: SAP SE

Inventor： Juchang Lee ,  Chang Gyoo Park ,  Francis Gropengiesser ,  Anil Kumar Goel ,  Deok Koo Kim ,  SunHo Lee

IPC: G06F17/30

CPC classification number: G06F16/2379 ,  G06F9/466 ,  G06F16/2343 ,  G06F16/2365

Abstract: A transaction management service layer monitors a plurality of read and write transactions being executed by the data engines by way of client libraries at each of a plurality of data engines. In addition, the transaction management server layer maintains and coordinates transaction timestamp and sequence numbers that are shared by the plurality of data engines. The transaction management service layer identifies and resolves conflicts among the plurality of transactions. The transaction management service layer is a separate and independent service that is isolated from other components of the plurality of data engines. Related apparatus, systems, techniques and articles are also described.

公开(公告)号：US20180074970A1

公开(公告)日：2018-03-15

申请号：US15261859

申请日：2016-09-09

Applicant: SAP SE

Inventor： Francis Gropengiesser ,  Jan-Markus Schwindt ,  Martin Weidner ,  Robert Schneider

IPC: G06F12/1009 ,  G06F12/0804

CPC classification number: G06F12/1009 ,  G06F12/0804 ,  G06F12/0868 ,  G06F2212/60

Abstract: Some embodiments provide a non-transitory machine-readable medium that stores a program. The program receives a request for a logical data structure. In response to the request, the program further identifies a size of a cache memory of the at least one processing unit. The program also determines a size of fragments of memory for the logical data structure based on the size of the cache memory. The program further requests a set of segments of memory. Upon receiving the set of segments of memory, the program also generates a plurality of fragments of memory from the set of segments of memory based on the size of fragments of memory. The program further groups the plurality of fragments of memory into the logical data structure. The plurality of fragments of memory are configured to store data of the logical data structure.

公开(公告)号：US20180074967A1

公开(公告)日：2018-03-15

申请号：US15261700

申请日：2016-09-09

Applicant: SAP SE

Inventor： Francis Gropengiesser ,  Jan-Markus Schwindt ,  Martin Weidner ,  Robert Schneider

IPC: G06F12/0882 ,  G06F12/02 ,  G06F12/06

CPC classification number: G06F12/0882 ,  G06F12/0246 ,  G06F12/0646 ,  G06F16/24 ,  G06F2212/1008 ,  G06F2212/1041 ,  G06F2212/608

Abstract: Some embodiments provide a non-transitory machine-readable medium that stores a program. The program receives a request for a logical data structure of an in-memory database. The program further determines a size of fragments of memory for the logical data structure based on a set of criteria. The program also requests a set of segments of memory. Upon receiving the set of segments of memory, the program further generates a plurality of fragments of memory from the set of segments of memory based on the size of fragments of memory. The program also groups the plurality of fragments of memory into the logical data structure. The plurality of fragments of memory are configured to store data of the logical data structure. The program further loads the plurality of fragments of memory into memory.