ram cache problem1

Mind that I have not tested this myself and I am currently not in position to do so, but I reckon you can use this method:

https://devcentral.f5.com/wiki/iRules.CACHE__expire.ashx

I imagine you can combine it with a custom header or cookie to set expiration.

Example (not tested or checked for syntax and painfully written on an iphone):

when HTTP_REQUEST {

   if { [HTTP:header exists expirecache] } {
      set cacheexp 1
   }
}

when CACHE_RESPONSE {
  if { [info exists cacheexp] && $cacheexp == 1 } {
    CACHE::expire
  } 
}

Note: If you don't want strangers invalidating your cache you might want to filter by ip as well. 🙂

/Patrik