[smokeping-users] Re: EchopingHTTP ignore_cache

[Stephane Bortzmeyer]

On Thu, Jul 29, 2004 at 01:06:04PM +0100,
 j.wu1 at lancaster.ac.uk <j.wu1 at lancaster.ac.uk> wrote 
 a message of 44 lines which said:

> I have really interesting results while echopinging the US academic
> websites ( www.harvard.edu and www.nyu.edu) and some commercial
> websites located in US (www.mp3.com and www.winamp.com) . No matter
> the request go through the local cache or not, it returned me with the
> same latency pattern (two graphs are identical.)

Probably because thee sites are not cache-friendly: they omit
Last-Modified and Expires so the cache does not know how long it may
cache and it decides to fetch again, to be sure.

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