4 ms·

I've recently deep-dived into QEMU performance especially in order to cut down boot/bootstrapping times for quickly running tests and I'd like to share some tri

I've recently deep-dived into QEMU performance especially in order to cut down boot/bootstrapping times for quickly running tests and I'd like to share some tricks: - Templating: https://qemu.readthedocs.io/en/v9.1.0/system/vm-templating.html https://qemu.readthedocs.io/en/v9.1.0/system/vm-templating.h... - virtio-fs: https://virtio-fs.gitlab.io/ https://virtio-fs.gitlab.io/ - Overlay storage images: https://wiki.archlinux.org/title/QEMU#Overlay_storage_images https://wiki.archlinux.org/title/QEMU#Overlay_storage_images

nijave 2y ago
Cloud init will handle unique IDs although might add some boot time
- remram 2y ago
  You need to get it to re-run, which I'm not sure there is a standard way to do during runtime. Can it even do all its job without a reboot?
  - nijave 2y ago
    Maybe I misunderstood, is this skipping boot as well? I was thinking the VM would still follow the normal boot process (in which case you can reset cloud init before powering down)
    - remram 2y ago
      Yes they are saving memory state to a file.