Re: [Xen-users] Dom0 for FreeBSD or Illumos

[Gordan Bobic <gordan@xxxxxxxxxx>]

On 07/23/2014 01:14 PM, Miles Fidelman wrote:
> Gordan Bobic wrote:
> > On 07/23/2014 12:09 PM, Ian Campbell wrote:
> >
> > > > > > On July 22, 2014 5:24:07 PM GMT+01:00, Miles Fidelman
> > > > > > <mfidelman@xxxxxxxxxxxxxxxx> wrote:
> > > > > >           Anybody know if we're every going to see Dom0 support
> > > > > > for either FreeBSD
> > > > > >           or Illumos?  It sure would be nice to be able to run Xen
> > > > > > over ZFS.
> > If the primary motivation for FreeBSD or Illumos is ZFS, the Linux ZFS
> > implementation works very well for me. I use it in dom0 and have my VM
> > images on zvols, with CIFS and NFS shares also exported from dom0 and
> > mounted in domUs.
> Hi Gordon,
>
> That's the primary motivation.  I'd like to move from Xen+md+LVM+DRBD to
> Xen+ZFS+DRBD for a couple of high-availability virtual machines running
> on a small cluster.
>
> Secondary motivation is getting more concerned by the development
> directions of Linux (monolithic systemd, redhat domination of the linux
> world, that sort of thing) - less sure that I want to keep our cluster
> on Debian, or Linux - and the illumos world seems to be getting real as
> a serious 3rd open-source Unix platform (OpenIndiana and SmartOS look
> particularly sweet).  illumos has ZFS but no Xen (we need full
> paravirtualization for our older machines) and no equivalent of DRBD.
> FreeBSD has ZFS and HAST but no Xen Dom0. NetBSD seems to have Xen Dom0
> (maybe slightly old, support seems questionable), but no ZFS.  Sigh...
I certainly relate to concerns over the direction of Linux, especially 
systemd, which I don't see as bringing anything meaningfully useful to 
the table when it comes to replacing SysV init.
On the other hand, while I am a RH user myself (for preference), I don't 
think RH is particularly dominating it, with Ubuntu becoming 
increasingly ubiquitous.
> I've been a bit scared by ZFS on Linux - at least the development web
> site makes it looks like the software is all beta, with not a lot of
> progress toward a real 1.0 release - gives off kind of a "not ready for
> prime time" feel.
Version numbers are increasingly meaningless. ZoL was announced as 
production ready at version 0.6.1.
> What platform are you running, and what's been your
> sense of readiness for production use?
I have been using it without problems since back when KQ Infotech 
released the POSIX ZoL layer a few years ago (based on 0.5.x), before 
ZoL project itself had a POSIX layer ready, and I've never had any 
problems or data loss, which is more than I can say for a lot of other 
FS-es I have used in that time.
I use EL6, CentOS and Scientific Linux.

Gordan

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