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RE: [Xen-users] streaming server on a virtual machine.

To: "'Mauro'" <mrsanna1@xxxxxxxxx>, "'Jeff Sturm'" <jeff.sturm@xxxxxxxxxx>
Subject: RE: [Xen-users] streaming server on a virtual machine.
From: "Antti Kanes" <antti@xxxxxxxx>
Date: Sat, 26 Sep 2009 14:29:25 +0300
Cc: 'xen-users' <xen-users@xxxxxxxxxxxxxxxxxxx>
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We're running a virtualized streaming server without any problems. 
Our server provides flash, windows media, real, quicktime and shoutcast
platforms without any hickups so far.

Naturally the feasibility of virtualizing a streaming server depends on how
heavy load it is put under; in our case this server has a sustained user
load of 30Mbps based on traffic and it doesn't generate really any load at
all on the server hardware yet. Also no haven't seen any performance issues
with network or disk IO.

There are some half a dozen other domU's running on the same system.

The flash streams are provided via Red5, but that's just one of the services
the system is offering, so I'd say virtualization of a media server is fine,
but naturally your mileage may vary; if your hardware server is running
close to its limits (be it IO or CPU), then virtualization (to the same
level of hardware) wouldn't make any sense as mentioned earlier.

  Antti Kanes

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Mauro
> Sent: 26. syyskuuta 2009 12:43
> To: Jeff Sturm
> Cc: xen-users
> Subject: Re: [Xen-users] streaming server on a virtual machine.
> 2009/9/18 Jeff Sturm <jeff.sturm@xxxxxxxxxx>:
> > I don't see why not.  If you're concerned about latency you could 
> > always pin the server to a physical CPU.
> >
> > (Lately we've been doing a lot of physical-to-virtual 
> migrations, and 
> > I've found myself asking: "What kinds of servers do we have that 
> > should never be virtual?"  There aren't many on that list.)
> >
> You say that a streaming server can be installed on a virtual machine.
> I don't want to create any kind of disturb but I've asked the 
> same question to the KVM mailing list and they said that a 
> streaming server (I user red5), due to the high I/O traffic, 
> it must absolutely not virtualized.
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