[Virtio-fs] [qemu-web PATCH v2] Add virtio-fs in OSv overview blog post
Dr. David Alan Gilbert
dgilbert at redhat.com
Fri Nov 6 18:11:55 UTC 2020
* Fotis Xenakis (foxen at 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 at 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 at redhat.com / Manchester, UK
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