[LINK] ACS new? submission on ISP filtering

[Stilgherrian]

On 19/03/2010, at 11:15 AM, Roger Clarke wrote:
> At 9:42 +1030 19/3/10, Glen Turner wrote:
>> ISPs can save significant bandwidth by hosting or peering
>> with content distribution networks for those huge static
>> items which do consume a lot of bandwidth.
> 
> So the http HEAD method doesn't work for such things?
> (We're talking specifically of 'static' items).

I'd say that doing an HTTP HEAD to see if the content has changed, then a GET to fetch the content if it has, triples the latency time before the content actually gets fetched. I don't think I'd like to do that.

Stil


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