FreeBSD 10 prognostication...

Oleg Moskalenko oleg.moskalenko at
Mon May 21 16:38:33 UTC 2012

Modern large-scale virtualization technologies are based upon bare-metal versions of VMWare and XenServer. They are not Linux and they are not FreeBSD - the Hypervisors are a specialized breed of OSes (albeit, the hypervisor manager is usually a UNIX-like OS). Any conventional OS (Linux, FreeBSD) can only do their best to be a "civilized" guest OS. Linux or FreeBSD cannot be a server platform for real enterprise virtualization - the hypervisors have won that place. This is not a contest point between Linux and FreeBSD. The jail system is not helpful for enterprise virtualization, either.


> -----Original Message-----
> From: owner-freebsd-current at [mailto:owner-freebsd-
> current at] On Behalf Of Dag-Erling Smørgrav
> Sent: Monday, May 21, 2012 1:58 AM
> To: Jamie
> Cc: Vincent Hoffman; Vance Siemens; Rick Macklem; freebsd-
> chat at; freebsd-current at
> Subject: Re: FreeBSD 10 prognostication...
> Jamie <jamie at> writes:
> > Jails are usually more suited to "cloud work" than KVM or the latest
> > OpenVZ/Containers/??? of the linux world ever will be...
> No, they're not.  VMWare, RHEV (KVM-based) etc. provide features such
> as
> seamless migration of virtual machines from one physical machine to
> another, automatic restart on a different physical server if one fails
> etc. that simply aren't possible with jails; and there are certain
> things you still can't run reliably / safely in jails - anything that
> relies on SysV IPC, for instance, such as PostgreSQL.
> --
> Dag-Erling Smørgrav - des at
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