updating a file

Friedrich Locke friedrich.locke at gmail.com
Thu Jan 24 14:33:16 CET 2013

Hi folks,

I am running varnish now. A doubt arose: how does varnish handle the scenario:

You update the content of a image file but not the url of it. If
varnished has cached that image before how does it know that image has
been updated ?
How much time does it take to varnish realize that image has been changed ?

Thanks in advance.

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