FreeBSD 10 prognostication...

Rainer Duffner rainer at
Mon May 21 19:55:02 UTC 2012

Am Mon, 21 May 2012 13:47:39 -0500
schrieb Jamie <jamie at>:

> On Mon, May 21, 2012 at 10:57:33AM +0200, Dag-Erling Sm??rgrav wrote:
> > 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.
> True about the SysV, and I mostly agree about automatic failover.
> But I think the FreeBSD jail system is still the better model for how
> I see these things being used (certainly the better *potential*). But
> yea, not "quite" cloud.
> When coupled with something like rsync, they *almost* do the job. And
> for a lot of the current "VPS" applications, they do the job. 

Yeah, but the VPS-systems (OpenVZ, Virtuozzo) do the job, too.
And for those who want the VPS-model without actually running Linux,
there's Joyent's Cloud (public/private) - that can run KVM, too.
AFAIK, KVM being slow means you don't have enough I/O.

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