On 1/13/03 1:04 PM, Perrin Harkins wrote: > John Siracusa wrote: >> The mod_rewrite solutions lack dead server detection, and that's something >> I'd rather not try to roll on my own, especially after seeing how well (or >> not, actually) existing software solutions do. But I've added it to the >> list. > ... >> It's kind of disappointing to hear that the mod_perl solution it probably >> not feasible. Perl solutions are always more fun to implement ;) > > The mod_rewrite option is a Perl solution. You would write some Perl > code to manage the availability checks and optionally to provide a new > load-balancing algorithm. It's very similar to using mod_perl for it, > except you get to skip writing lots of annoying proxy code.
But in a full-fledged mod_perl solution, I could back out gracefully and retry another server if I happened to initially choose a dead server before my dead server detection code caught it. With the rewrite solution, I can't think of a reasonable way to keep users from ever getting passed to dead server. (Obviously I can't check the server I plan to send to on every request :) -John
