Date: Tue, 9 Jun 2026 08:49:40 -0700 From: Rick Macklem <rick.macklem@gmail.com> To: Bakul Shah <bakul@iitbombay.org> Cc: Dan Shelton <dan.f.shelton@gmail.com>, freebsd-hackers@freebsd.org Subject: Re: BHYVE on NFSv4.2 filesystem? Message-ID: <CAM5tNy4AO7JqXuKrWjR8ABVc4VhJR0ipicWbatA5w3BG2PXqxg@mail.gmail.com> In-Reply-To: <C5C7DD8C-3DC5-4CE1-A260-EB86A44F86BE@iitbombay.org> References: <CAAvCNcAmVFUveVcvPBYN1Ph4eVbj3Nzta3aChBQj=WxON2NnKQ@mail.gmail.com> <CAAvCNcBdzu=2w78awKDGE2adQ0asF2ZyZWkYvaKRO2KdfuJ8tw@mail.gmail.com> <D9B72D33-469A-49E1-9C6F-0E0BCE4E9BFC@iitbombay.org> <CAAvCNcAqoL7JjQfQq-Z8pauuxNHWU90Hk0rMrRoA8u-tGAJ=bw@mail.gmail.com> <C5C7DD8C-3DC5-4CE1-A260-EB86A44F86BE@iitbombay.org>
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On Mon, May 18, 2026 at 3:39 PM Bakul Shah <bakul@iitbombay.org> wrote: > > On May 18, 2026, at 2:26 PM, Dan Shelton <dan.f.shelton@gmail.com> wrote: > > > > On Fri, 20 Feb 2026 at 01:21, Bakul Shah <bakul@iitbombay.org> wrote: > >> > >> On Feb 19, 2026, at 11:45 AM, Dan Shelton <dan.f.shelton@gmail.com> wrote: > >>> > >>> On Wed, 18 Feb 2026 at 22:45, Dan Shelton <dan.f.shelton@gmail.com> wrote: > >>>> > >>>> Hello, > >>>> > >>>> Has anyone tried a BHYVE with a disk as file on a NFSv4.2 mount? > >> > >> Yes. [I tried this on a 15.0-RELEASE-p3 host, nfsv4.2 mounting > >> a filesystem from a 15.0-STABLE machine] > > > > How about the performance? Is it better than iSCSI? > > I don't know about iSCSI but comparing with p9fs: > > Test1: > dd bs=1m count=4000 > /dev/null < large-file > > nfsV3: > 32.3 > 46.3 > 51.3 > > nfsV4: > 129.1 > 59.9 > 48.8 > > p9fs: > 17.7 > 17.5 > 17.6 > > Test2: > find /usr/src/ > /dev/null > > nfsV3: > 60.0 > 39.0 > 30.9 > > nfsV4: > 54.0 > 17.9 > 35.8 > > p9fs: > 6.9 > 6.5 > 6.6 > > > So slower in all cases. In addition the variability in nfs numbers is concerning! > > p9fs doesn't cache but nfs does, so anything cached is served much faster. At this time it is only a hunch, but I think this might help.. https://datatracker.ietf.org/doc/draft-ietf-nfsv4-uncacheable-files/ I plan on implementing this soon for FreeBSD. rick > > >home | help
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