-As of December 2021, Azure Batch began offering Spot-based compute nodes in Batch. Like low-priority VMs, you can use spot instances to obtain spare capacity at a discounted price in exchange for the possibility that the VM will be preempted. If a preemption occurs, the spot compute node will be evicted and all work that wasn't appropriately checkpointed will be lost. Checkpointing is optional and is up to the Batch end-user to implement. The running Batch task that was interrupted due to preemption will be automatically requeued for execution by a different compute node. Additionally, Azure Batch will automatically attempt to seek back to the target preempted node count as specified on the pool.
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