Standard_B4ms has a temp size of 32 GiB, which can fit the 30 GiB OS disk. To enable Ephemeral OS disk on temp, the temp disk size must be equal to or larger than 30 GiB. If you want to opt for Temp disk placement: Standard Ubuntu server image from marketplace is about 30 GiB. #Ephemeral storage series#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 storage windows#The image OS disk’s size should be less than or equal to the temp/cache size of the VM size chosen.įor 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 MigrationĮphemeral OS disk can be stored either on VM's OS cache disk or VM's temp/resource disk.ĭiffDiskPlacement 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-deallocatedĭata on the OS disk is deleted, OS is reprovisionedįor Windows, page file is stored on the resource diskįor 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 Storageĭata 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:Ĭache size or temp size for the VM size or 2040 GiB, whichever is smaller.
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