Date: Fri, 16 Feb 2024 09:42:35 -0800 From: "Chuck Tuffli" <chuck@tuffli.net> To: "Matthew Grooms" <mgrooms@shrew.net>, "FreeBSD virtualization" <freebsd-virtualization@freebsd.org> Subject: Re: bhyve disk performance issue Message-ID: <28ea168c-1211-4104-b8b4-daed0e60950d@app.fastmail.com> In-Reply-To: <6a128904-a4c1-41ec-a83d-56da56871ceb@shrew.net> References: <6a128904-a4c1-41ec-a83d-56da56871ceb@shrew.net>
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On Fri, Feb 16, 2024, at 9:19 AM, Matthew Grooms wrote:
> Hi All,
>=20
>=20
>=20
> I'm in the middle of a project that involves building out a handful of=
servers to host virtual Linux instances. Part of that includes testing =
bhyve to see how it performs. The intent is to compare host storage opti=
ons such as raw vs zvol block devices and ufs vs zfs disk images using h=
ardware raid vs zfs managed disks. It would also involve
>=20
>=20
=E2=80=A6
> Here is a list of a few other things I'd like to try:
>=20
>=20
> 1) Wiring guest memory ( unlikely as it's 32G of 256G )
> 2) Downgrading the host to 13.2-RELEASE
FWIW we recently did a similar exercise and saw significant performance =
differences on ZFS backed disk images when comparing 14.0 and 13.2. We d=
idn=E2=80=99t have time to root cause the difference, so it could simply=
be some tuning difference needed for 14.=20
=E2=80=94chuck
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<!DOCTYPE html><html><head><title></title><style type=3D"text/css">p.Mso=
Normal,p.MsoNoSpacing{margin:0}</style></head><body><div>On Fri, Feb 16,=
2024, at 9:19 AM, Matthew Grooms wrote:<br></div><blockquote type=3D"ci=
te" id=3D"qt" style=3D""><p>Hi All,<br></p><p><br></p><div>I'm in the mi=
ddle of a project that involves building out a
handful of servers to host virtual Linux instances. Part of that
includes testing bhyve to see how it performs. The intent is to
compare host storage options such as raw vs zvol block devices and
ufs vs zfs disk images using hardware raid vs zfs managed disks.
It would also involve<br></div><p><br></p></blockquote><div>=E2=80=
=A6<br></div><blockquote type=3D"cite" id=3D"qt" style=3D""><p><span sty=
le=3D"color:rgb(27, 30, 32);">Here is a list of a few other things I'd l=
ike to try:</span><br></p><div> <br></div><div> 1) Wiring guest memory (=
unlikely as it's 32G of 256G )<br></div><div> 2) Downgrading the host t=
o 13.2-RELEASE<br></div></blockquote><div><br></div><div>FWIW we recentl=
y did a similar exercise and saw significant performance differences on =
ZFS backed disk images when comparing 14.0 and 13.2. We didn=E2=80=99t h=
ave time to root cause the difference, so it could simply be some tuning=
difference needed for 14. <br></div><div><br></div><div>=E2=80=94c=
huck</div></body></html>
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