>> > Since I have 2 app servers (separate boxes), I plan on running 10 >> mongrels >> > on each.. I am assuming I just simply use: >> >> Why 10? Have you tested that assumption? We found 4 mongrels to be our >> sweet spot... http://mongrel.rubyforge.org/docs/how_many_mongrels.html > > Well, Someone else on the team had previously set up 10 so that is what I > was assuming to go with here. I will read the link you just gave me. Thanks > you!
Yeah, definitely go through the steps in that URL. We had been running 20 FCGI's then went to 8 mongrels I believe then Zed posted those docs and when we tested we found 4 to be ideal. Seems counter intuitive, but there ya go :) > Also, you might consider merging the web/app servers... we found that >> apache didn't use up that many resources serving static files so each of >> our servers runs both apache and mongrel. So you might consider running >> apache + 4 mongrels on each of the 4 servers... > > I did think of that and suggested it to the CIO. I was wondering why we > would go 2 and 2 when 4 and 4 gives us the performance and redundancy, I am > pondering your suggestions whole heartedly. Just a note I have been a *nix > admin for roughly 8 years but this is my first Rails production environment. > So I don't have much experience. Your feedback is more than helpful. I suppose it depends on how hard your apache servers are working. Ours don't work that hard at all so we'd rather rails had access to more ram/cpu... > Guess I'm assuming your HTTP is behind some other load balancer... > > Interestingly enough we don't. In many of the other networks we did have HW > for load balancing. This environment is using round robin dns, though this > is my first encounter with using round robin to handle the load balancing > needs as well. I am open to any suggestions you may have in regards to the > direction we should investigate. Right now there are 4 machines but soon > that may double. So I am thinking of both short-term and long-term needs > right now. Anything else you have to offer would be appreciated. Hrm. I think I would. The problem with round robin is how long the cycle is... if it's too long and you get slashdotted (for example) won't all those new users end up on a single web server? I didn't set it up, but I like the load balancer we've got since it lets us disable a backend and we can take it offline and do whatever we want with it and bring it back up, etc... I haven't used it, but a lot of people really seem to like HAproxy as a software solution. Might be worth investigating as well. -p _______________________________________________ Mongrel-users mailing list Mongrel-users@rubyforge.org http://rubyforge.org/mailman/listinfo/mongrel-users
