A company uses Amazon EC2 Reserved Instances to run its data processing workload. The nightly job typically takes 7 hours to run and must finish within a 10-hour time window.

The company anticipates temporary increases in demand at the end of each month that will cause the job to run over the time limit with the capacity of the current resources.

Once started, the processing job cannot be interrupted before completion. The company wants to implement a solution that would provide increased resource capacity as cost-effectively as possible.

What should a solutions architect do to accomplish this?