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公开(公告)号：US20190155705A1
公开(公告)日：2019-05-23
申请号：US15877074
申请日：2018-01-22
Applicant: SAP SE
Inventor： Mahendra Chavan , Reiner Singer , Markus Behrens , John Smirnios , Anant Agarwal
Abstract: Disclosed herein are system, method, and computer program product embodiments for coordinated replication of heterogeneous database stores. An embodiment operates by determining a synchronization point based on a commit log of a primary data center. A current log position of each of a plurality of secondary slave servers associated with a secondary master server of a secondary data center is requested. It is determined that the current log position of at least one of the secondary slave servers does not correspond to the logged position of a corresponding primary slave server relative to the synchronization point. An update indicating that the current log position of each of the secondary slave servers corresponds to the logged position of each of the relative corresponding primary slave servers is received. A replay of each of the secondary slave servers up to the synchronization point is initiated.
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Patent Agency Ranking
公开(公告)号：US20250045297A1
公开(公告)日：2025-02-06
申请号：US18228446
申请日：2023-07-31
Applicant: SAP SE
Inventor： Markus Behrens , Reiner Singer , Werner Thesing , Yue Zhu , Omran Saleh
IPC: G06F16/27
Abstract: Various examples are directed to systems and methods for operating a primary database management system and a secondary database management system. The secondary database management system may receive a takeover request indicating that the secondary database management system is to assume a role of the primary database system. The secondary database management system may determine that a last valid commit of a first host of the secondary database system is an oldest last valid commit. The secondary database management system may revert to a first state of the primary database management system corresponding to the last valid commit of the first host. The secondary database management system may be configured to assume the role of the primary database management system.
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公开(公告)号：US20250045178A1
公开(公告)日：2025-02-06
申请号：US18228395
申请日：2023-07-31
Applicant: SAP SE
Inventor： Markus Behrens , Reiner Singer , Werner Thesing , Yue Zhu , Mitja Kleider , Omran Saleh , Timo Sulg , Marcel Birn , Christoph Roterring
Abstract: A scale-out computing cluster may include a large number of computing servers and storage devices. In order to provide high reliability, the computing cluster must be able to handle failures of individual devices. Reliability of the computing cluster may be improved by providing a standby server for each active server in the computing cluster. If any active server fails, the corresponding standby server is activated. The failed server may be brought back online or replaced, at which time the restored server becomes the standby server for the now-active original standby server. During the restoration period, if any other active server fails, the standby server for that active server is immediately activated. As a result, the recovery ability of the computing cluster is only challenged if both servers of an active/standby pair fail during the restoration period, substantially improving reliability.
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公开(公告)号：US20250045296A1
公开(公告)日：2025-02-06
申请号：US18228427
申请日：2023-07-31
Applicant: SAP SE
Inventor： Markus Behrens , Werner Thesing , Yue Zhu , Mitja Kleider , Omran Saleh , Jan Scheperski , Timo Sulg , Markus Glatz , Steffen Michael Wagner
IPC: G06F16/27
Abstract: Various examples described herein are directed to systems and methods for operating a database management system. A first host may be executed at a first container of a cloud environment. The first host may be configured according to a first set of operating parameters and may perform a source role. A second host may be executed at a second container of the cloud environment. The second host may be configured according to the first set of operating parameters and may perform a replica role or the source role. A request to modify at least one operating parameter of the first source may be received. A third host may be started at a third container and configured to perform at least one of the source role or the replica role for the source role. At least one of the first host or the second host may be shut down.
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公开(公告)号：US20250045034A1
公开(公告)日：2025-02-06
申请号：US18228412
申请日：2023-07-31
Applicant: SAP SE
Inventor： Markus Behrens , Reiner Singer , Werner Thesing , Yue Zhu , Mitja Kleider , Omran Saleh , Timo Sulg , Jan Scheperski , Markus Glatz , Steffen Michael Wagner , Ahsan Nasir
Abstract: Various examples are directed to systems and methods for operating a database management system. A first host of a first version may be executed at a first container of a cloud environment. A second host of a second version may be executed at a second container of the cloud environment. The first host may be configured to perform a source role and the second host may be configured to perform a replica role corresponding to the source role. A network layer executing at the cloud environment may receive a request directed to the second host. The network layer may determine that the request is consistent with allowed request data describing allowed requests and may send the request to the second host.
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公开(公告)号：US11216346B2
公开(公告)日：2022-01-04
申请号：US15877074
申请日：2018-01-22
Applicant: SAP SE
Inventor： Mahendra Chavan , Reiner Singer , Markus Behrens , John Smirnios , Anant Agarwal
Abstract: Disclosed herein are system, method, and computer program product embodiments for coordinated replication of heterogeneous database stores. An embodiment operates by determining a synchronization point based on a commit log of a primary data center. A current log position of each of a plurality of secondary slave servers associated with a secondary master server of a secondary data center is requested. It is determined that the current log position of at least one of the secondary slave servers does not correspond to the logged position of a corresponding primary slave server relative to the synchronization point. An update indicating that the current log position of each of the secondary slave servers corresponds to the logged position of each of the relative corresponding primary slave servers is received. A replay of each of the secondary slave servers up to the synchronization point is initiated.
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