Azure Batch service—low priority Azure Virtual Machines (VMs)
Published date: May 11, 2017
Low-priority VMs are now available at a large discount compared to regular on-demand VMs. If Batch applications will be able to tolerate interruption, and job execution time is flexible, then using low-priority VMs can significantly reduce the cost of running workloads, or allow much more work to be performed at a greater scale, for the same cost.
Read more in the Batch documentation.