[e2e] ECN deployment

[Vimal]

Hi Anoop,

On 20 August 2010 13:35, Anoop Ghanwani <anoop at brocade.com> wrote:
> I was hoping to also get responses from people with
> experience running data centers or high-performance
> computing environments.
>
> I guess most people in such environments, just
> like service providers, overdesign the network so
> that loss seldom happens.  Thus there is no tangible
> benefit of going through the hassle with enabling
> ECN in all of the devices.
>

While over provisioning networks or having deep buffered switches
might help reduce packet losses, it does not help deal with queuing
delays.  In fact, in this year's SIGCOMM, there's a paper that talks
about how a particular ECN marking scheme can be used to maintain
small queue occupancies in switch buffers.  Here's a link to the paper
if you're interested:
http://research.microsoft.com/apps/pubs/?id=121386

Regards,
-- 
Vimal