Perhaps we should measure it. :) I'd be happy to look at the data if people had a moment to run a Glasnost test (http://www.measurementlab.net/measurement-lab-tools) - might be interesting to compare results across ISPs... On Sat, 8 Oct 2011, Philip D'Ath wrote:
I'd be surprised if anyone is using a transparent cache for local content.
Transparent caching only makes sense if it is going to save you money. Also you would need much bigger caching boxes to handle both national and international traffic, as opposed to just international.
-----Original message----- From: Simon Lyall Sent: 08-10-2011, 23:24 To: nznog Subject: Re: [nznog] Proxy Servers...
On Sat, 8 Oct 2011, Ragnor wrote:
It does sounds like Vodafone are running a caching transparent http/web proxy now. These are all the rage again now with Telecom, Telstraclear, Slingshot and others running them.
I believe there are still a number of ISP's not running one: Snap, Xnet, Orcon, Maxnet ICONZ, Actrix and probably more.
Do these ISP level cache's actually work? I have long lived images with headers to indicate their age and long expire time and I get a fresh copy every time I request it from my XTRA DSL account.
We certainly notice browser caches and the Corporate proxies (lots of IE6 users, proxy doesn't support http gzip compression, often bluecoat) especially when they break (usually by caching a corrupt element or no updating properly) but I don't get the impression ISP proxies are caching even my "highly cacheable" stuff.
Is it because we are delivering bytes out of NZ? I can switch to delivering out of the US if it'll hit the "Free ISP CDN" :)
-- Simon Lyall | Very Busy | Web: http://www.darkmere.gen.nz/ "To stay awake all night adds a day to your life" - Stilgar | eMT.
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