I/O fault injection using simulated computing environments
View Patent ↗A system for injecting I/O faults into a closed system, for example, the injection of link level I/O faults, involves the use of a simulated computing environment. In an embodiment, the system provides for fault injection using an emulated IBM System z environment and including the use of FICON and/or other suitable communication channel protocols. The emulated System z environment may include a simulated z/OS and/or emulated System z hardware and software components.
1. A method for injecting I/O faults, comprising:
providing a simulated computing environment, wherein the simulated computing environment includes a simulated operating system;
accessing the simulated computing environment with a fault injector; and
injecting I/O faults into the simulated computing environment, wherein injecting the I/O faults into the simulated computing environment includes injecting the I/O faults into an I/O portion of the simulated operating system.
2. The method according to claim 1 , wherein the simulated operating system is a simulated z/OS.
3. The method according to claim 1 , wherein the simulated computing environment includes a simulated System z platform.
4. The method according to claim 3 , wherein the simulated System z platform includes a simulated I/O subsystem that is modifiable with the fault injector.
5. The method according to claim 1 , wherein the simulated computing environment includes a channel emulator.
6. The method according to claim 5 , wherein the channel emulator acts as an I/O subsystem providing FICON communication capability.
7. A computer-readable medium storing computer software that injects I/O faults, the computer software comprising:
executable code that provides a simulated computing environment, wherein the simulated computing environment includes a simulated operating system;
executable code that accesses the simulated computing environment with a fault injector; and
executable code that injects I/O faults into the simulated computing environment, wherein the executable code that injects the I/O faults into the simulated computing environment includes executable code that injects the I/O faults into an I/O portion of the simulated operating system.
8. The computer-readable medium according to claim 7 , wherein the simulated operating system is a simulated z/OS.
9. The computer-readable medium according to claim 7 , wherein the simulated computing environment includes a simulated System z platform.
10. The computer-readable medium according to claim 9 , wherein the simulated System z platform includes a simulated I/O subsystem that is modifiable with the fault injector.
11. The computer-readable medium according to claim 7 , wherein the simulated computing environment includes a channel emulator.
12. The computer-readable medium according to claim 11 , wherein the channel emulator acts as an I/O subsystem providing FICON communication capability.
13. A method for simulated computer environment processing, comprising:
providing a simulated computing environment, wherein the simulated computing environment includes a simulated operating system that provides simulated z/OS functionality;
running a z/OS process on the simulated computing environment using the simulated operating system.
14. The method according to claim 13 , wherein the simulated computing environment includes a simulated System z platform.
15. The method according to claim 13 , wherein the simulated computing environment includes a channel emulator.
16. The method according to claim 15 , wherein the channel emulator acts as an I/O subsystem providing FICON communication capability.