Re: [Nbd] [PATCH 1/3] nbd: support FLUSH requests

[Wouter Verhelst <w@...112...>]

On Tue, Feb 12, 2013 at 07:22:26PM +0100, Nicolas Trangez wrote:
> On Tue, 2013-02-12 at 19:06 +0100, Paolo Bonzini wrote:
> > Il 12/02/2013 18:37, Alex Bligh ha scritto:
> > > For my education, why remove the FUA stuff?
> > 
> > Because I had no way to test it.
> > 
> > >>> > > Hmmm... the underlying storage could be md/dm RAIDs in which case FUA
> > >>> > > should be cheaper than FLUSH.
> > >> > 
> > >> > If someone ever wrote a virtio-blk backend that sits directly ontop
> > >> > of the Linux block layer that would be true.
> > > In this case we don't know what the backend is sitting on top of
> > > a-priori. It might be the current nbd server code, but it might
> > > not be.
> > 
> > Do you know of any other NBD server than the "official" one and qemu-nbd?
> 
> Not used 'in production' (for now...), but yeah:
> https://github.com/NicolasT/nbd

there's also xnbd, whose author decided it would be better to
reimplement his own nbd-server from scratch.

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