Latency between GCI Anchorage and VZB in NY

William Pitcock nenolod at systeminplace.net
Wed May 26 12:05:19 CDT 2010


Hi,

On Wed, 2010-05-26 at 11:27 -0400, Brad Beck wrote:
> All,
> 
> I've been working diligently to improve performance of interactive
> applications (Citrix, terminal) that are run by users in our office
> located in Anchorage, and are served by a managed Internet connection
> provided by GCI.  Our applications reside in the Buffalo, NY area.
> 

The interactivity problem probably has more to do with your Citrix
setup.  What specs are your Citrix server(s)?  I doubt it is
virtualized, but just in case, is it?  I ask because it sounds more like
iowait.

Process Explorer (sysinternals) can be useful for listing CPU and I/O
hungry applications on the Citrix server(s).

> Via MTR, I've seen no or almost-no lost packets, whereas RTT averages
> around 124ms and at times is as high as 328ms.
> 
> I'm looking for feedback from others regarding this RTT, hopefully
> from customers of GCI.  328ms RTT is high as far as I'm concerned, and
> it seems like this could be controlled a little better.

Spikes in RTT are likely normal.  Your managed internet connection is
probably provided over an MPLS private network, which means that it
still has to share packet queues with other customers.

William





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