Managing a workload in an environment

A system for testing a set of alternative environments for running a set of workloads including an original workload of an original computer environment, the system comprising:

• an establishing module configured to establish a shadow workload on a shadow computer environment, wherein the shadow workload includes a copy of the original workload;
• a communicating module configured to communicate a shadow input for the shadow workload, wherein the shadow input includes a copy of an original input for the original workload;
• a collecting module configured to collect an original output from the original workload and a shadow output from the shadow workload;
• and
• a determining module configured to determine, by comparing the original output from the original workload with the shadow output from the shadow workload, whether the shadow computer environment is configured to operate the original workload.

A computer program product comprising a computer readable storage medium having a computer readable program stored therein, wherein the computer readable program, when executed on a first computing device, causes the first computing device to:

• establish a shadow workload on a shadow computer environment, wherein the shadow workload includes a copy of an original workload;
• communicate a shadow input for the shadow workload, wherein the shadow input includes a copy of an original input for the original workload;
• collect an original output from the original workload and a shadow output from the shadow workload;
• and
• determine, by comparing the original output from the original workload with the shadow output from the shadow workload, whether the shadow computer environment is configured to operate the original workload.