in particular, suppose 5 requestors request the same URL in a span of 10
seconds, where
a response takes 30min (no timeouts), and is valid for 1hr.
Is there a way to make the 4 requests following the first wait for the
first request's results?
If its not possible directly with mod_cache, is it possible via filters,
and had anyone done something
similar?
About the end goal:
we have an xml database that we use as little more than blob storage (we
don't do any element indexing,
etc, just store xml as blobs). For our purposes, mod_cache sounds like
a smarter way to go,
because rather than db semantics like
select blob B from database
if B = null,
get data
store data as B in database
continue
we'd have
select B from http://our_apache_with_mod_cache/B
and mod_cache transparently executes
if B = null,
get data
store data as B in database
continue
The one hang up we have is that some requests can be very expensive -
2hrs to generate, 10mb of data. We've
built semantics around our blob db to queue identical requests, but can
we get this free or cheaply from apache +
mod_cache + special code?
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