公开(公告)号：GB2602544A

公开(公告)日：2022-07-06

申请号：GB202115084

申请日：2021-10-21

Applicant: IBM

Inventor： FELIX BEIER ,  DENNIS BUTTERSTEIN ,  SABINE PERATHONER-TSCHAFFLER ,  EINAR LUECK

IPC: G06F16/27

Abstract: A computer implemented method comprises receiving at least one log record 130 describing a type of operation performed in a source database system 101. Based on the type of operation, an update strategy is selected from a set of pre-defined update strategies. The update strategy specifies a sequence of replication operations to be performed in order to apply changes described in the at least one log record to a target database system 103. The change described in the log record may then be applied using the chosen update strategy in order to synchronize data across multiple databases. If the update of the target database fails, an alternative update strategy may be used instead. The method may be useful in a system in which both older and newer versions of the incremental update software are available, and a choice must be made about which to use.

公开(公告)号：GB2533086A

公开(公告)日：2016-06-15

申请号：GB201421743

申请日：2014-12-08

Applicant: IBM

Inventor： EINAR LUECK ,  DANIEL MARTIN ,  SABINE PERATHONER-TSCHAFFLER ,  ANDREAS BRODT

IPC: G06F17/30

Abstract: A trigger event is detected (402) and in response to the trigger event an apply engine stops applying data changes to at least one part of the target database (403). In response to stopping the applying of data changes a start load signal (SLS) is inserted into a log of the source database for identifying unreplicated data changes. Loading of a part of the data content from the master database to the target database is then initialised (406). After the loading has completed an end of load signal (ELS) is inserted into the log and the apply engine applies stored write statements while identifying and skipping all write statements whose data changes were already transferred to the target database by the loading.

公开(公告)号：GB2602544A8

公开(公告)日：2022-07-20

申请号：GB202115084

申请日：2021-10-21

Applicant: IBM

Inventor： FELIX BEIER ,  DENNIS BUTTERSTEIN ,  SABINE PERATHONER-TSCHAFFLER ,  EINER LUECK

IPC: G06F16/27

Abstract: A computer implemented method comprises receiving at least one log record 130 describing a type of operation performed in a source database system 101. Based on the type of operation, an update strategy is selected from a set of pre-defined update strategies. The update strategy specifies a sequence of replication operations to be performed in order to apply changes described in the at least one log record to a target database system 103. The change described in the log record may then be applied using the chosen update strategy in order to synchronize data across multiple databases. If the update of the target database fails, an alternative update strategy may be used instead. The method may be useful in a system in which both older and newer versions of the incremental update software are available, and a choice must be made about which to use.