Ævar Arnfjörð Bjarmason wrote: > On Wed, Jul 15, 2009 at 12:42 AM, Brion Vibber<br...@wikimedia.org> wrote: >> Static maps of arbitrary size presumably have much the same problem here as >> the map tile images. How is it handled there?" > > The same way I want to do static map generation. Just put an arbitrary > expiry time on it & serve it to the client.
Handy that! >> It might be good to use a Google Maps Static-like model here; the >> MediaWiki end can just make itself an <img> and stick all the relevant >> info onto the URL, calling out to the static map server. > > That's a very good idea, but I'd been assuming that I wouldn't be able > to do that -- that each apache server was supposed to do things like > EasyTimeline generation / image rescaling and likewise static map > generation on its own & write it to the shared image NFS. > > But just being able to call out to an existing server makes things a > whole lot easier. Yep... this way is usually easier to manage for us, and also helps to isolate services for performance and security reasons. If the map rendering goes crazy and uses ten bajillion gigs of RAM and disk space, we don't want that taking down the site. :) If it's isolated and nothing depends on synchronous result returns, then you just don't get new maps until it's fixed. For things like the PDF rendering where we need to be able to return data through the main web servers, isolation is still better -- we just need a timeout on fetches to make sure we don't get a million reqs stuck if the service hangs. > This also means that we can set up the Wikimedia Deutschland servers > to do tile rendering and then easily test it on a big wiki (like > dewiki) by just enabling the SlippyMap extension which won't do > anything more fancy than point static/tile URLs to the external > service. > > So yay! :D >> Either storing it on local disk there or simply leaving it to be cached by >> upper-level squids > > Throwing it at the squids and making it their problem would be simpler > for *me* at least. Hehehe... -- brion _______________________________________________ Wikitech-l mailing list Wikitech-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikitech-l
