Testing in a disaster recovery computer system

A system comprising:

• a memory having computer readable instructions;
• and
• one or more processors for executing the computer readable instructions, the computer readable instructions controlling the one or more processors to perform operations comprising:
• configuring a disaster recovery computer system as a test environment of a mainframe computer system, the disaster recovery computer system comprising a mirror image of a production environment, wherein the disaster recovery computer system is a backup of a primary production computer system;
• accessing a test plan to determine one or more values of test data to use for a plurality of test cases and a sequence of executing the test cases, wherein the test plan defines a plurality of parameters to configure the test environment of the disaster recovery computer system;
• executing the test cases in the test environment of the disaster recovery computer system based on the test plan to perform stress and load testing in combination with a plurality of production workloads executing in the test environment of the disaster recovery computer system;
• monitoring a stress and load impact on a plurality of computer system resources of the disaster recovery computer system based on execution of the test cases;
• and
• disabling the test environment and reconfiguring the disaster recovery computer system as a production system based on a failure of the primary production computer system.

A computer program product comprising a non-transitory computer readable storage medium having program instructions embodied therewith, the program instructions executable by one or more processors to cause the one or more processors to perform operations comprising:

• configuring a disaster recovery computer system as a test environment of a mainframe computer system, the disaster recovery computer system comprising a mirror image of a production environment, wherein the disaster recovery computer system is a backup of a primary production computer system;
• accessing a test plan to determine one or more values of test data to use for a plurality of test cases and a sequence of executing the test cases, wherein the test plan defines a plurality of parameters to configure the test environment of the disaster recovery computer system;
• executing the test cases in the test environment of the disaster recovery computer system based on the test plan to perform stress and load testing in combination with a plurality of production workloads executing in the test environment of the disaster recovery computer system;
• monitoring a stress and load impact on a plurality of computer system resources of the disaster recovery computer system based on execution of the test cases;
• and
• disabling the test environment and reconfiguring the disaster recovery computer system as a production system based on a failure of the primary production computer system.