April 23, 20215 yr KVM supports having sparse VM disks along with marking regions as sparse when the guest VM trims the virtual disk. Exposing this in the web UI would be quite useful for people storing VMs on an SSD.
April 23, 20215 yr Community Expert What do you think should be shown in the GUI? Vdisks created for VMs are already sparse under unRaid.
February 13, 20224 yr Hmm, I've created 72GB VM and installed Srv2022Std. Image should be few GBs on cache drive and but it is 72GB. Sparse images should grow with data written and should have option to shrink/compact them, especially after using "sdelete -z" on VM. Exactly like in Virtualbox and VMWare. How to enable such option?
February 14, 20224 yr 21 hours ago, CobraPL said: Image should be few GBs on cache drive and but it is 72GB. How are you viewing that? To see the allocated size, use the console and du -sk /path/to/image/vdisk.img and see what it reports.
February 14, 20224 yr 13 minutes ago, JonathanM said: It's enabled by default. No it's not. The are still technically "sparse", but will always eventually grow to the maximum size of the vdisk and never shrink, won't be trimmed etc (ie: as you add files to the VM, the image will grow, but when you delete files it won't shrink. You eventually (shortly) get to a point where the vdisk is the maximum size and stays there forever To enable this, you need to do (and as a bonus, write performance will also increase)
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