#EPHEMERAL VS ETHEREAL SERIES#
#EPHEMERAL VS ETHEREAL WINDOWS#

In this case, the Standard_DS3_v2 is the smallest size in the DSv2 series that you can use with this image. The Standard_DS3_v2 has a cache size of 127 GiB, which is large enough.

#EPHEMERAL VS ETHEREAL WINDOWS#

The image OS diskвЂ™s size should be less than or equal to the temp/cache size of the VM size chosen.ДЇor example, if you want to opt for OS cache placement: Standard Windows Server images from the marketplace are about 127 GiB, which means that you need a VM size that has a cache equal to or larger than 127 GiB. You can choose to deploy Ephemeral OS Disk on VM cache or VM temp disk. With this feature, when a Windows VM is provisioned, we configure the pagefile to be located on the OS Disk. Maintenance of VM/VMSS using Live MigrationД®phemeral OS disk can be stored either on VM's OS cache disk or VM's temp/resource disk.ДiffDiskPlacement is the new property that can be used to specify where you want to place the Ephemeral OS disk.

Supported during VM creation and after VM is stop-deallocatedДata on the OS disk is deleted, OS is reprovisionedДЇor Windows, page file is stored on the resource diskДЇor Windows, page file is stored on the OS disk (for both OS cache placement and Temp disk placement). VMs and scale set instances can be stop-deallocated and restarted from the stop-deallocated state OS disk data written to OS disk are stored in Azure StorageДata written to OS disk is stored on local VM storage and isn't persisted to Azure Storage. VM sizes that support Premium storage such as DSv1, DSv2, DSv3, Esv3, Fs, FsV2, GS, M, Mdsv2, Bs, Dav4, Eav4 For the cache or temp size in GiB, see DS, ES, M, FS, and GS Key differences between persistent and ephemeral OS disks:Д¬ache size or temp size for the VM size or 2040 GiB, whichever is smaller. Ephemeral OS disks are free, you incur no storage cost for OS disks.Lower latency, similar to a temporary disk.Ability to fast reset or reimage VMs and scale set instances to the original boot state.Supported by Marketplace, custom images, and by Azure Compute Gallery (formerly known as Shared Image Gallery).With Ephemeral OS disk, you get lower read/write latency to the OS disk and faster VM reimage. Ephemeral OS disks work well for stateless workloads, where applications are tolerant of individual VM failures but are more affected by VM deployment time or reimaging of individual VM instances. Applies to: вњ”пёЏ Linux VMs вњ”пёЏ Windows VMs вњ”пёЏ Flexible scale sets вњ”пёЏ Uniform scale setsД®phemeral OS disks are created on the local virtual machine (VM) storage and not saved to the remote Azure Storage.

Ephemeral vs ethereal