North American Network Operators Group

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Re: latency (was: RE: cooling door)

  • From: Mikael Abrahamsson
  • Date: Sat Mar 29 21:34:43 2008

On Sat, 29 Mar 2008, Frank Coluccio wrote:

Please clarify. To which network element are you referring in connection with
extended lookup times? Is it the collapsed optical backbone switch, or the
upstream L3 element, or perhaps both?

I am talking about the matter that the following topology:

server - 5 meter UTP - switch - 20 meter fiber - switch - 20 meter fiber - switch - 5 meter UTP - server

has worse NFS performance than:

server - 25 meter UTP - switch - 25 meter UTP - server

Imagine bringing this into metro with 1-2ms delay instead of 0.1-0.5ms.

This is one of the issues that the server/storage people have to deal with.

Mikael Abrahamsson    email: [email protected]