Re: [Virtio-fs] [qemu-web PATCH v2] Add virtio-fs in OSv overview blog post

[Dr. David Alan Gilbert]

* Fotis Xenakis (foxen@windowslive.com) wrote:
> This post briefly goes over the main points of virtio-fs and OSv, a
> unikernel running under QEMU/KVM and taking advantage of its virtio-fs
> implementation.
> 
> Changes since v1:
> - Fixed wording and links, as suggested by Thomas Huth.
> - Added a short example of virtio-fs usage in OSv.
> 
> Signed-off-by: Fotis Xenakis <foxen@windowslive.com>

> +One central point is OSv's support for booting from virtio-fs: this enables
> +deploying a modified version or a whole new application **without 
> rebuilding**
> +the image, just by adjusting its root file system contents on the host. Last,
> +owing to the DAX window practically providing low-overhead access to the 
> host's
> +page cache, scalability is also expected to excel, with it being a common
> +concern due to the potentially high density of unikernels per host.

Hi Fotis,
  Since I'm not used to unikernels, I'm a little confused by this; I'd
appreciate some explanation.

  In your unikernel, does the root filesystem just contain data?  I mean
being a 'unikernel' aren't all the binaries and support all linked into
the kernel itself?

Dave
-- 
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK