Message affinity in geographically dispersed disaster restart systems
The system, products, and methods disclosed herein relate to an improved configuration for geographically dispersed data restart (“GDDR”) systems. Specifically, the teachings herein ensure a particular GDDR instance does not react to messages issued from address spaces outside of its affinity group. We use the term message “affinity group” to mean the combination of a particular GDDR instance and its set of Mainframe Enablers started tasks. By ensuring that the particular GDDR instance does not react to messages intended for recipients outside of its affinity group, we improve computer functionality and efficiency by facilitating further partitioning of the logical partition. Once the logical partition is further partitioned into additional address spaces, it is possible to run Mainframe Enablers and/or additional GDDR instances independent of the particular GDDR instance of concern.
1. A method for enabling a geographically dispersed disaster recovery (“GDDR”) control system or a managed production system having a subsystem connector associated therewith and being a part of an affinity group to coexist on a mainframe, the mainframe having a Mainframe Enablers address space outside of the affinity group comprising the steps of:
a. receiving within a main address space for the GDDR (“GDDRMAIN”) a message from the Mainframe Enablers address space, the message comprising a message identifier and a plurality of message characteristics;
b. evaluating the message identifier to determine if whether or not a message affinity analysis should be performed;
c. scheduling a service request block to run in an address space from which the message was sent;
d. verifying the address space from which the message was sent;
e. determining a subsystem connector associated with the address space from which the message was sent; and
f. comparing the subsystem connector associated with the address space from which the message was sent to the subsystem connector for the GDDRMAIN address space.
2. The method of claim 1 , wherein the subsystem connector is a GDDR connector or an SCF connector.
3. The method of claim 1 , wherein the subsystem connectors are a dummy data definition in the job control language.
4. The method of claim 1 , wherein the mainframe is a logical partition.
5. The method of claim 1 , wherein the affinity group is the control system or a managed production system having a subsystem connector associated therewith and one or more Mainframe Enablers address spaces having the same subsystem connector associated therewith.
6. The method of claim 1 , wherein the plurality of message characteristics is at least one of a message issuers address space identifier, job step task control block address, a job name, or a job identifier.
7. The method of claim 1 , wherein the GDDRMAIN address space is also an address space belonging to another automation product.
8. The method of claim 1 , wherein one or more of the Mainframe Enablers address spaces are also alternative address spaces of interest to the GDDR system or to another automation product.
9. A computer program product for enabling a geographically dispersed disaster recovery (“GDDR”) control system or a managed production system having a subsystem connector associated therewith and being a part of an affinity group to coexist on a mainframe, the mainframe having a Mainframe Enablers address space outside of the affinity group, the computer program product being embodied in a tangible, non-transitory computer readable storage medium and comprising computer instructions for:
a. receiving within a main address space for the GDDR (“GDDRMAIN”) a message from the Mainframe Enablers address space, the message comprising a message identifier and a plurality of message characteristics;
b. evaluating the message identifier to determine if whether or not a message affinity analysis should be performed;
c. scheduling a service request block to run in an address space from which the message was sent;
d. verifying the address space from which the message was sent;
e. determining a subsystem connector associated with the address space from which the message was sent; and
f. comparing the subsystem connector associated with the address space from which the message was sent to the subsystem connector for the GDDRMAIN address space.
10. The computer program product of claim 9 , wherein the subsystem connector is a GDDR connector or an SCF connector.
11. The computer program product of claim 9 , wherein the subsystem connectors are a dummy data definition in the job control language.
12. The computer program product of claim 9 , wherein the mainframe is a logical partition.
13. The computer program product of claim 9 , wherein the affinity group is the control system or a managed production system having a subsystem connector associated therewith and a Mainframe Enablers address space having the same subsystem connector associated therewith.
14. The computer program product of claim 9 , wherein the plurality of message characteristics is at least one of a message issuers address space identifier, job step task control block address, a job name, or a job identifier.
15. A system having a memory partitioned into a plurality of address spaces, the system enabling a geographically dispersed disaster recovery (“GDDR”) control system having a subsystem connector associated therewith and being a part of an affinity group to coexist on a mainframe, the mainframe having a Mainframe Enablers address space outside of the affinity group comprising computer executable code for performing the steps of:
a. receiving within a main address space for the GDDR (“GDDRMAIN”) a message from the Mainframe Enablers address space, the message comprising a message identifier and a plurality of message characteristics;
b. evaluating the message identifier to determine if whether or not a message affinity analysis should be performed;
c. scheduling a service request block to run in an address space from which the message was sent;
d. verifying the address space from which the message was sent;
e. determining a subsystem connector associated with the address space; and
f. comparing the subsystem connector associated with the address space from which the message was sent to the subsystem connector for the GDDRMAIN address space.
16. The system of claim 15 , wherein the subsystem connector is a GDDR connector or an SCF connector.
17. The system of claim 15 , wherein the subsystem connectors are a dummy data definition in the job control language.
18. The system of claim 15 , wherein the mainframe is a logical partition.
19. The system of claim 15 , wherein the affinity group is the control system or a managed production system having a subsystem connector associated therewith and a Mainframe Enablers address space having the same subsystem connector associated therewith.
20. The system of claim 15 , wherein the plurality of message characteristics is at least one of a message issuers address space identifier, job step task control block address, a job name, or a job identifier.