Re: cache issue

Thank you so much this is exactly the information I was looking for :)

Best,

--Ev

> Question: I regularly update documents on the web server, but the updates 
> never seem to appear. What's wrong?
> 
>  Answer: It is important to understand how caching works on a web server, 
> and in a web browser. Here is a hypothetical scenario that will explain 
> the issue:
> 
> WebTen is operating under normal conditions and a commonly-accessed page 
> is located in the Squid cache. A browser requests this page and it is 
> transmitted by Squid without checking to see if the page has updated. 
> This is where WebTen's speed comes from. Now, if a browser "Reload" 
> request is given by the browser to Squid, Squid will check to see if the 
> page has updated and it will serve the latest copy. If a "Super-reload" 
> request is given to Squid it will serve the page from disk no matter what.
> 
>  Squid keeps commonly-accessed pages in its cache for three days. Once 
> this time has expired, Squid automatically dumps the contents of its 
> cache and commonly-accessed pages are stored in cache as they are 
> accessed.
> 
>  Netscape has an option entitled "Page in cache is compared to page on 
> Network". The options for this feature are: "Once per session", "Every 
> time", and "Never". If Netscape is set to "Never", it will never ask 
> Squid if the page is updated! If the option is set to "Once per session", 
> Netscape will ask once if the page has been updated, and if the option is 
> set to "Every time", Netscape will always ask Squid if it has the latest 
> document. Tenon recommends that you set your Netscape settings to verify 
> documents "Every time". This gives you the maximum "Reload" 
> functionality. To force Netscape to do a "Super-reload", simply hold down 
> the "option" key while clicking "Reload" on Macintosh systems, and hold 
> down the shift key while clicking "Reload" on all other platforms.
> 
>  Unfortunately, Internet Explorer does not have the cache options that 
> Netscape does. The best IE can do is a "normal" reload which is initiated 
> by holding down the shift key and clicking the reload button. Numerous 
> users have encountered problems with IE because it rarely (sometimes 
> never) checks to see if the page on the network has changed and will only 
> serve up documents out of its cache. Until Internet Explorer handles 
> caching properly, we strongly recommend against using IE for web-page 
> verification.
> 
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