[hanwenn]

Thanks for writing the blog post; it was a fascinating read!

I was curious about a couple of things:

* Have you considered future extensions where you can start the VM before you completed the FS copy?

* You picked XFS over ZFS and BTRFS. Any reason why XFS in particular?

* You casually mention that you wrote 'otterlink', your own hypervisor. Isn't that by itself a complicated effort worthy of a blog post? Or is it just mixing and matching existing libraries from the Rust ecosystem?

[jeroenhd]

Not the author, but:

> Any reason why XFS in particular?

XFS is still the default filesystem of choice for many enterprise systems. For instance, Red Hat states in their manual [1]:

    In general, use XFS unless you have a specific use case for ext4. 

There are good reasons to choose other file systems, but if you just want good performance on simple storage, XFS is a pretty good default.

[1] https://docs.redhat.com/en/documentation/red_hat_enterprise_...

[hanwenn]

Also: did you consider using LVM snapshots?