söndagen den 1 juni 2008 skrev Frederik Ramm: > Hi, > > > i have done quite some thinking lately how to speed up the [EMAIL PROTECTED] > > upload. I've come up with an complete new structure of the server System. > > There was a rather cool concept on the Wiki about a year ago where > we would distribute tiles using DNS, i.e. you would always find > the "responsible" server through DNS instead of through expensive > database lookups and HTTP redirects.
I have not given up on it. I'm just slow to implement it when I have no time for it. > My personal thinking though is that we don't need a complex system > like that because as soon as chrschmidt gets the new disks, everything > is going to run smoothly again. There lots of things to improve that that a distributed system will solve. But untill then, new disks will make it a bit better. > A highly distributed concept, in my eyes, has one big drawback: We > must assume that at any one time, a small percentage of tile servers > will be down or slow. The usability of a map display is greatly > reduced even if only one tile is missing. I would go so far as to say > that a map consisting of 20 tiles, where one tile is a broken image, > is a "failure". This means that if you get the tiles for one map > display from 20 tile servers, then you have not a single point of > failure, but 20 cascading single points of failure ;-) I would have to prove you wrong at another time. With one server responsible to add and remove and test the distributed servers will be able to detect when a server is failing, is slow or lagging updates and will automaticly make a change in the DNS-zone to reflect this. -- Johan Thelmén (jth & TeLLuS) Falun Sweden _______________________________________________ Tilesathome mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/tilesathome
