The Atlanta Ruby Users Group (ATLRUG) recently moved their meetings to a much friendlier location for me. Rather than heading up into the forbidden north of Atlanta, it is now being held in the convenient location of Tech Square in Midtown. Of course this probably means nothing to anyone reading this from outside Atlanta.
In any case, it was a really great group, and they were very welcoming to new people, of which there were very many. Following the free pizza and pre-meeting chit-chat, we saw two presentations.
Metaprogramming
First up was Stephen Touset with a talk on metaprogramming. This is what is going on behind the scenes with all the method_missing stuff. Probably the most well known example would be the dynamic finders (ie. “find_by_email_and_username”). Stephen delved deep into metaclasses, and it was fairly confusing. I’ve dealt with class_eval and such before, but mainly from a “copy someone else’s stuff and modify to suit” sort of way. As I said during the meetup, “It’s possible to do metaprogramming without knowing what you’re doing.”
Nginx
Mark Percival followed Stephen with a presentation on Nginx, a fast little web server. I’ve always been a fan of Apache, but mainly because I felt safe with it. Even though it was a pain to configure, I knew that if I ever had to ask “How do I do X on the web?” then the answer would be in Apache language.
However, it never occurred to me that it might be overkill. As Mark explained, if all your Apache server is doing is proxying to mongrel, then it’s a big hammer for a tiny problem. The memory footprint is fairly high, and the configuration is a pain. Face it, Apache is not very friendly.
Mark claimed that Nginx was friendlier. To be fair, the config file was shorter. However, it still looked fairly arcane to me. I guess easy is in the eyes of the beholder.
Still, the memory issues are something I can’t ignore. Obsidian Portal runs on a VPS from Rimuhosting, so memory is a scarce resource. If I can reclaim enough memory to run another mongrel instance, that would be quite a coup. However, the real offender on my VPS is Tomcat. What!?! Tomcat!?! Well, I needed something to run Solr, and Tomcat is the only servlet container I’m familiar with. So, even though it’s a memory hog, it’ll have to stay for now.
Overall thoughts
All in all, the meetup was great. As I said, everyone was very nice, and all seemed fairly down to earth. There were no pissing contests over who was the better hacker, and newbie questions were answered honestly and humbly. I can’t wait until next month’s meeting. Maybe I’ll even try to scrape something together to present.
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