On Wed, 18 Jan 2012 14:29:31 -0800, Thomas Dalton
<thomas.dal...@gmail.com> wrote:
On 18 January 2012 22:14, John Du Hart <compwhi...@gmail.com> wrote:
Cache pollution.
It would have to be a severely broken cache to be polluted by a 503.
503 is for temporary unavailability, you would be stupid to cache it.
You do realize that going by what you are saying. If 503's weren't cached
for that reason, then EVERY single request would be forwarded to the
apaches.
That means all the cache optimization would disappear and ALL of
Wikipedia's IMMENSE anonymous user traffic that's been sustained by the
caches would suddenly start all hitting the apaches. Naturally the cluster
is not designed to handle that. In fact I bet it could take down the
blackout page by essentially DoSing Wikipedia.
--
~Daniel Friesen (Dantman, Nadir-Seen-Fire) [http://daniel.friesen.name]
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