METADATA-DRIVEN DYNAMIC LOAD BALANCING IN MULTI-TENANT SYSTEMS

• US 20140372550A1
• Filed: 06/12/2013
• Published: 12/18/2014
• Est. Priority Date: 06/12/2013
• Status: Active Grant

• Current Assignee: SAP SE
• Original Assignee: SAP AG (SAP SE)
• Inventors: Said, Bare, Jentsch, Frank, Brunswig, Frank
• Granted Patent: US 10,091,282 B2
• Time in Patent Office: Days
• US Class Current: 709/213
• CPC Class Codes: H04L 67/1008 based on parameters of servers, e.g. available memory or workload monitoring of computer activity G06F11/30

Abstract

The disclosure generally describes computer-implemented methods, computer program products, and systems for providing metadata-driven dynamic load balancing in multi-tenant systems. A computer-implemented method includes: identifying a request related to a model-based application executing in a multi-tenant system associated with a plurality of application servers and identifying at least one object in the model-based application associated with the request. At least one application server is identified as associated with a locally-cached version of a runtime version of the identified object, and a determination of a particular one of the identified application servers to send the identified request for processing is based on a combination of the availability of a locally-cached version of the runtime version at the particular application server and the server'"'"'s processing load. The request is then sent to the determined application server for processing.

Claims

1. A computer-implemented method, the method executed by one or more processors, the method comprising:

identifying a request related to a model-based application executing in a multi-tenant system, the multi-tenant system associated with a plurality of application servers;

identifying at least one object in the model-based application associated with the identified request;

identifying at least one application server associated with a locally-cached version of at least one runtime version of the at least one identified object in the model-based application; and

determining a particular application server from the at least one application servers to send the identified request for processing based at least in part on the locally-cached version of the at least one runtime version being available at the particular application server and the processing load of the particular application server.

2. The method of claim 1, wherein two or more application servers are associated with a locally-cached version of at least one runtime version of the at least one identified object in the model-based application, and wherein determining the particular application server from the two or more application servers to send the identified request for processing includes:

ranking the two or more application servers based on a correlation of the locally-cached versions of the at least one runtime objects to the at least one object associated with the identified request.

3. The method of claim 2, wherein determining the particular application server from the at least one application servers to send the identified request for processing is based, at least in part, on a relatively higher ranking of the particular application server as compared to the other application servers.

4. The method of claim 1, further comprising sending the identified request to the determined application server for processing.

5. The method of claim 1, wherein identifying the at least one object in the model-based application associated with identified request includes accessing a metadata repository associated with the model-based application to identify one or more design time objects associated with the identified request.

6. The method of claim 5, wherein identifying at least one application server associated with a locally-cached version of at least one runtime version of the at least one identified object in the model-based application includes:

accessing a cache map storing information defining a current status of local caches of each of the plurality of application servers to identify at least one runtime version of the one or more design time objects associated with the identified request.

7. The method of claim 6, wherein the cache map includes information on the local cache of each application server, where each local cache stores each runtime object available at the respective application server.

8. The method of claim 7, wherein the cache map is updated in response to changes to any local cache of any of the application servers associated with the multi-tenant system.

9. The method of claim 1, wherein identifying the at least one object in the model-based application associated with identified request includes:

identifying at least one object required to respond to the identified request; and

identifying at least one object associated with at least one potential operation to be performed subsequent to the initial response to the identified request.

10. The method of claim 9, wherein identifying the at least one object associated with at least one potential operation to be performed subsequent to the initial response to the identified request is based on a relationship of the at least one object associated with the al least one potential object to the at least one identified object required to respond to the identified request within the model-based application.

11. The method of claim 1, wherein the determination of the particular application server to send the identified request for processing is based on an algorithm weighing availability of locally-cached versions of the at least one runtime version at each of the application servers and the relative processing load of each application server.

12. The method of claim 1, wherein identifying the at least one object in the model-based application associated with the identified request is based, at least in part, on the identity of a user associated with request.

13. A computer program product, the computer program product comprising computer-readable instructions embodied on tangible, non-transitory media, the instructions operable when executed by at least one computer to:

identify a request related to a model-based application executing in a multi-tenant system, the multi-tenant system associated with a plurality of application servers;

identify at least one object in the model-based application associated with the identified request;

identify at least one application server associated with a locally-cached version of at least one runtime version of the at least one identified object in the model-based application; and

determine a particular application server from the at least one application servers to send the identified request for processing based at least in part on the locally-cached version of the at least one runtime version being available at the particular application server and the processing load of the particular application server.

14. The computer program product of claim 13, wherein two or more application servers are associated with a locally-cached version of at least one runtime version of the at least one identified object in the model-based application, and wherein determining the particular application server from the two or more application servers to send the identified request for processing includes:

ranking the two or more application servers based on a correlation of the locally-cached versions of the at least one runtime objects to the at least one object associated with the identified request.

15. The computer program product of claim 14, wherein determining the particular application server from the at least one application servers to send the identified request for processing is based, at least in part, on a relatively higher ranking of the particular application server as compared to the other application servers.

16. The computer program product of claim 13, wherein identifying the at least one object in the model-based application associated with identified request includes accessing a metadata repository associated with the model-based application to identify one or more design time objects associated with the identified request.

17. The computer program product of claim 16, wherein identifying at least one application server associated with a locally-cached version of at least one runtime version of the at least one identified object in the model-based application includes:

accessing a cache map storing information defining a current status of local caches of each of the plurality of application servers to identify at least one runtime version of the one or more design time objects associated with the identified request, wherein the cache map includes information on the local cache of each application server, and where each local cache stores each runtime object available at the respective application server.

18. The computer program product of claim 17, wherein the cache map is updated in response to changes to any local cache of any of the application servers associated with the multi-tenant system.

19. The computer program product of claim 13, wherein identifying the at least one object in the model-based application associated with identified request includes:

identifying at least one object required to respond to the identified request; and

identifying at least one object associated with at least one potential operation to be performed subsequent to the initial response to the identified request, wherein identifying the at least one object associated with at least one potential operation to be performed subsequent to the initial response to the identified request is based on a relationship of the at least one object associated with the al least one potential object to the at least one identified object required to respond to the identified request within the model-based application.

20. The computer program product of claim 13, wherein the determination of the particular application server to send the identified request for processing is based on an algorithm weighing availability of locally-cached versions of the at least one runtime version at each of the application servers and the relative processing load of each application server.

21. A system, comprising:

a processor;

a computer-readable storage medium coupled to the processor having instructions stored thereon which, when executed by the processor, cause the processor to perform operations comprising;

identifying a request related to a model-based application executing in a multi-tenant system, the multi-tenant system associated with a plurality of application servers;

identifying at least one object in the model-based application associated with the identified request;

identifying at least one application server associated with a locally-cached version of at least one runtime version of the at least one identified object in the model-based application; and

determining a particular application server from the at least one application servers to send the identified request for processing based at least in part on the locally-cached version of the at least one runtime version being available at the particular application server and the processing load of the particular application server.