Re: [Xen-users] Server purchase pointers

["Luke S. Crawford" <lsc@xxxxxxxxx>]

On Fri, Feb 24, 2012 at 05:51:59PM -0500, Javier Guerra Giraldez wrote:
> On Fri, Feb 24, 2012 at 4:42 PM, Luke S. Crawford <lsc@xxxxxxxxx> wrote:
> > Why would you need to do traffic shaping on dark fiber?  with simple
> > 10G-LR optics you can do 10G over a pair.
> 
> because he's getting only 100Mbit/s   of course, if he's paying for
> dark fiber (unlikely) somebody is skimping on the tranceivers.

Right; someone else was saying that dark fiber would solve the problem
except for the traffic shaping problem.   If you only have 100Mbps, 
you probably have a lower-tier product, and traffic shaping is going
to be important to performance, as that's just not a lot of bandwidth.

My point was just that if you were lighting your own dark fiber, getting
to way more bandwidth than you can send is probably the way to go.  If
you lease a pair of fiber and own the equipment at either end, the cost
for the dark fiber is the same, regardless if you buy equipment that can
do 100M/sec or equipment than can do 2TB/sec, so you might as well 
get a fast enough link.



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