Re: [Xen-users] Server purchase pointers

[Jeff Sturm <jeff.sturm@xxxxxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxx] On
> Behalf Of Javier Guerra Giraldez
> Sent: Friday, February 24, 2012 3:11 PM
> 
> On Fri, Feb 24, 2012 at 5:05 AM, Bart Coninckx <bart.coninckx@xxxxxxxxxx> 
> wrote:
> > I've been assured that the line performs close to a LAN connection.
> 
> 
> don't believe that until you see hard round-trip-time numbers.  LAN latencies 
> are under
> a single milisecond (unless badly configured), but even short WANs are hard 
> pressed to
> go under 10msec.

It clearly depends on distance.  The hard limit here is speed of light.  So the 
best theoretical latency between, say, New York and L.A. is 30ms round-trip.  
In practice, if you're seeing double that (60ms), you're doing well, since the 
fiber isn't a straight line and each hop adds a little latency of its own.

-Jeff



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