Merge pull request #97953 from mscurrell/spotvmsplan

Added information about migration to spot vms

Author: PRMerger18

articles/batch/batch-low-pri-vms.md

@@ -9,7 +9,7 @@ ms.assetid: dc6ba151-1718-468a-b455-2da549225ab2
 ms.service: batch
 ms.topic: article
 ms.workload: na
-ms.date: 03/19/2018
+ms.date: 12/05/2019
 ms.author: markscu
 ms.custom: seodec18
 
@@ -26,6 +26,14 @@ The tradeoff for using low-priority VMs is that those VMs may not be available t
 Low-priority VMs are offered at a significantly reduced price compared with dedicated VMs. For pricing details, 
  see [Batch Pricing](https://azure.microsoft.com/pricing/details/batch/).
 
+> [!NOTE]
+> [Spot VMs](https://azure.microsoft.com/pricing/spot/) are now available for [single instance VMs](https://docs.microsoft.com/azure/virtual-machines/linux/spot-vms) and [VM scale sets](https://docs.microsoft.com/azure/virtual-machine-scale-sets/use-spot). Spot VMs are an evolution of low-priority VMs, but differ in that pricing can vary and an optional maximum price can be set when allocating Spot VMs.
+>
+> Azure Batch pools will start supporting Spot VMs in the first quarter of 2020 with new versions of the [Batch APIs and tools](https://docs.microsoft.com/azure/batch/batch-apis-tools). Low-priority VMs will continue to be supported, using current API and tool versions, for at least 12 months, to allow sufficient time for migration to Spot VMs. 
+>
+> Spot VMs will not be supported for [Cloud Service Configuration](https://docs.microsoft.com/rest/api/batchservice/pool/add#cloudserviceconfiguration) pools. To use Spot VMs, Cloud Service pools will need to be migrated to [Virtual Machine Configuration](https://docs.microsoft.com/rest/api/batchservice/pool/add#virtualmachineconfiguration) pools.
+
+
 ## Use cases for low-priority VMs
 
 Given the characteristics of low-priority VMs, what workloads can and cannot use
@@ -245,3 +253,4 @@ To view metrics in the Azure portal:
 
 * Read the [Batch feature overview for developers](batch-api-basics.md), essential information for anyone preparing to use Batch. The article contains more detailed information about Batch service resources like pools, nodes, jobs, and tasks, and the many API features that you can use while building your Batch application.
 * Learn about the [Batch APIs and tools](batch-apis-tools.md) available for building Batch solutions.
+* Start to plan the move from low-priority VMs to Spot VMs. If you use low-priority VMs with **Cloud Service configuration** pools, then plan to move to **Virtual Machine configuration** pools.