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difference between the Edsv4 and Esv4 VM series

can you confirm that the only difference between the Edsv4 and Esv4 VM series is that the Edsv4 have a temp disk? e.g. comparing Standard_E8ds_v4 to Standard_E8s_v4 https://docs.microsoft.com/en-us/azure/virtual-machines/ev4-esv4-series https://docs.microsoft.com/en-us/azure/virtual-machines/edv4-edsv4-series

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There are few more minor differences between them:

  • Edsv4 VMs are generally available while Esv4 VMs are in preview.

  • Edsv4 VMs have local SSD storage (up to 2,400 GiB) while Esv4 does not have.

  • Edv4 supports Ephemeral OS disks but Esv4 does not.

Do check out New general purpose and memory-optimized Azure Virtual Machines with Intel now available.

Let me know if this helps your query.


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hank you for your answer Harshita,

We are looking to build a cluster (with Elasticsearch) with fast disk read/writes . We looked at the LSV option (e.g. Standard_L8s_v2) but these are not supported for VMSS that are in zones.

We are looking to other options, including the ULTRA SSD (https://azure.microsoft.com/en-us/blog/announcing-the-general-availability-of-azure-ultra-disk-storage/).

To use these Ultra SSD (that support up to 160k IOPS and 2000 MBps), Microsoft advise that you need a VM SKU that supports that throughput. As I can tell to achieve, even nearly the 160k IOPS, we would need to use a VM SKU like a Standard_E64s_v4 (which is £4000 an hour) that supports 80k IOPS.

Am I correct in saying that? to use an Ultra SSD you need a VERY large VM SKU to take advantage of the IOPS. but to use an LSV like a Standard_L8s_v2 (40k IOPS) which costs £600 a month

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@MichealRodda-4430, just checking in to see if my previous comments helped you.

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Ultra Disk Storage is designed to provide customers with extreme flexibility when choosing the right performance characteristics for their workloads. Organizations can achieve the maximum I/O limit of a virtual machine (VM) with Ultra Disk Storage without having to stripe multiple disks. Check out the blog post “Azure Ultra Disk Storage: Microsoft's service for your most I/O demanding workloads” for a deep under-the-hood view.

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The only infrastructure redundancy options currently available to ultra disks are availability zones. VMs using any other redundancy options cannot attach an ultra disk. Please note that it is supported for both LSV2 and ESV4 options Do check out this for it's GA limitations.

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@MichealRodda-4430, just checking in to see if my previous comments helped you.

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@MichealRodda-4430, just checking in to see if my previous comments helped you.

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