公开(公告)号：US20180013692A1

公开(公告)日：2018-01-11

申请号：US15202366

申请日：2016-07-05

Applicant: SAP SE

Inventor： Chang Gyoo Park ,  Juchang Lee ,  Kyu Hwan Kim ,  Chul Won Lee ,  Myunggon Park ,  Eunjin Song ,  Nosub Sung

IPC: H04L12/911 ,  H04L29/08

CPC classification number: H04L67/22 ,  G06F17/30286 ,  G06F17/30477 ,  H04L45/742

Abstract: Technologies are described for facilitating replay of requests for database operations. A plurality of requests for database operations are received. Each of the plurality of requests includes a type, an access unit identifier, and a chronological identifier. Execution dependencies are determined between the plurality of requests based on the type, access unit identifier, and chronological identifier of each of the plurality of requests. The execution dependencies are stored.

公开(公告)号：US20170147671A1

公开(公告)日：2017-05-25

申请号：US14946757

申请日：2015-11-19

Applicant: SAP SE

Inventor： Christian Bensberg ,  Norman May ,  Alexander Boehm ,  Juchang Lee ,  Sung Heun Wi ,  Jeong Ae Han ,  Ki Hong Kim ,  Kyu Hwan Kim ,  Chul Won Lee ,  Andreas Kemmler ,  Christoph Glania ,  Armin Risch ,  Kai Morich

IPC: G06F17/30

CPC classification number: G06F17/30578 ,  G06F17/3048

Abstract: A method may include receiving a query for data to be provided by a database server, wherein the query includes an indication of a maximum lag. The method may further include determining whether a hint is available to apply to the query, wherein the hint affects an execution of the query. When no hint is available, a baseline database server may be selected to be the database server. When the hint is available, a replication server or a cache server may be selected to be the database server based on the hint and the maximum lag. The query may be processed at the selected database server.