Remote Data disk storage is billed separately from virtual machines. Dsv4-series VMs feature Intel Hyper-Threading Technology. it makes validation a bit trickier but I agree it's worthwhile. The Dv4-series sizes offer a combination of vCPU, memory and remote storage options for most production workloads. Tl dr: unlikely before it's out of preview on the compute side, but probably sooner or later. A better example might be Azure/kubernetes-volume-drivers#82, but fortunately I don't think that's very standard behavior. I'm mostly worried about the intersection with other features which may use the temp disk like #1753 (although admittedly, ephemeral os on cache disk would solve the same root problem that moving docker root to temp solves). I don't think we will add cache disk before it's out of preview, but we will probably support it at some point after that. I wrestled with this exact issue when looking at it the first time, there's an unfortunately large matrix of various skus supporting things (ephemeral os, cache size, temp disk available/size, requested os disk size), which we have to consider/expose to end users. For me this is a better solution as it offers me larger disks on smaller VM sizes. My understanding is that you see Standard_HDD for ephemeral OS because that's the storage class of the "clean" copy (admittedly not my product area, so don't quote me on that □).ĭo you know if you'll be supporting Ephemeral OS Disks on temp disks in AKS soon as well? I noticed that was in Preview. With non-ephemeral OS, the diff still writes back to Azure storage persistently. With ephemeral OS, the diff disk is exclusively local to the VM and will not persist data after e.g. When you provision the VM, you also need a diff disk to write changes made during runtime. To really get in the weeds, my understanding is you always need a "clean" copy of the image to do operations like reimage. Standard HDD showing in disks is just a subsequent artifact and is not indicative of the actual local storage device that is enabling Ephemeral OS via the cache.
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