Brainspl.at: My Xen and the Art of Rails Deployment Talk Slides

"My Xen and the Art of Rails Deployment Talk Slides" by Ezra

Wed, 13 Jun 2007 16:55:48 +0000

@Fred- OpenVZ does not offer the same level of separation since all VM's run on the same kernel. THis means that VM's can have a much more drastic affect on other VM's on the same machine. In Xen each VM has its own kernel and this allows for much better separation of concerns.

"My Xen and the Art of Rails Deployment Talk Slides" by Fred

Wed, 13 Jun 2007 09:58:27 +0000

Very good,but why not use OpenVZ instead of Xen since the former can provide a better performace?

"My Xen and the Art of Rails Deployment Talk Slides" by Joe Ruby

Tue, 29 May 2007 16:48:12 +0000

Don't you proofread your slides? :P I appreciate them though! Hopefully you blog more about Xen in the future, particularly how it's set up.

"My Xen and the Art of Rails Deployment Talk Slides" by Eugueny

Thu, 24 May 2007 19:54:14 +0000

Awesome PDF, thank you. I have 4 questions though. 1. I am wondering where is this coming from: "95% of Rails app will leak memory". I have very little experience with Rails, but my understanding is that Ruby's green threads implementation is the only "shady" area where nasty leaks can occur. But rails is 100% single-threaded. What leaks are you talking about then? 2. My second question is about "most Rails apps are RAM bound, not CPU bound". And then you say that typical Mongrel instance eats 120MB. Meaning? Is a maximum RAM allowed per instance? And then it fails (ruby memory allocation) or what? 3. How many Mongrel instances do you recommend instantiating per CPU/Core? 4. I think I don't get your reasoning behind "Apache's bloat". Does that lead to slow performance? Is that a overall system-wide bottleneck in your deployment? Once again, awesome presentation. Thank you!

"My Xen and the Art of Rails Deployment Talk Slides" by Ezra

Thu, 24 May 2007 03:40:07 +0000

Rich- We use plain old open source xen, just now getting on Xen3.1, we roll our own gentoo for our linux. But centos or debian are easy ways to get started with Xen as they have packages for xen kernels easily available. Highly suggest getting a precompiled kernel Xen working first before you try building custom kernels. and such. We use all supermicro hardware. getting it from silicon mechanics lately and they do a good job.

"My Xen and the Art of Rails Deployment Talk Slides" by Ben Reubenstein

Wed, 23 May 2007 17:22:18 +0000

For distros, I usually roll gentoo, and I believe Engine Yard does too...

"My Xen and the Art of Rails Deployment Talk Slides" by Rich Duzenbury

Wed, 23 May 2007 04:39:55 +0000

Awesome presentation. Easily the most content of any of the others that I saw. I'm trying to get into xen now. You made a comment during your talk that '8 way 32Gb Ram machines aren't that hard to come by'. I'm curious as to whether you are building them yourself, or do you know a good vendor? Also, when you want to install xen, which package or method do you use? I see they have 'enterprise', 'server', 'express' and 'open source'. If open source, it seems that you need a distro loaded before you can install. Can you share what distro you prefer? Many thanks. Regards, Rich

"My Xen and the Art of Rails Deployment Talk Slides" by John Wulff

Mon, 21 May 2007 19:05:32 +0000

Thanks for the slides. Your talk was one of my favorite at RailsConf07 great work!

"My Xen and the Art of Rails Deployment Talk Slides" by Alex

Mon, 21 May 2007 15:11:04 +0000

Thanks Rufo. Much appreciated!

"My Xen and the Art of Rails Deployment Talk Slides" by Rufo Sanchez

Mon, 21 May 2007 13:27:42 +0000

Alex, Ezra did mention briefly that Nginx's author believed Neko to be faster in his circumstance than Lua - not sure of any other reasons but I thought I'd mention it. Rufo

"My Xen and the Art of Rails Deployment Talk Slides" by Alex

Mon, 21 May 2007 02:04:09 +0000

Thanks for the slides. Very interesting I am sorry I did not get to hear the talk. Out of interest, where can I find more details about the integration of Neko in to Nginx? I know this is outside of the scope of this blog but do you have any idea why Neko has been chosen of Lua? I am not saying one should have been chosen over the other, I am just wondering what contributed to the decision.

"My Xen and the Art of Rails Deployment Talk Slides" by Faisal N. Jawdat

Mon, 21 May 2007 00:42:51 +0000

Any thoughts on how lighty 1.5 does or does not change the equation?

"My Xen and the Art of Rails Deployment Talk Slides" by Dan Kubb

Sun, 20 May 2007 20:10:48 +0000

Ezra, I had tickets to Railsconf, but wasn't able to attend -- yours was one of the main talks I wanted to see, so thanks for putting these up. Now that I've read through the presentation, I didn't see any mention of the Varnish HTTP proxy. I was curious if you've looked at it or not and how you think it stacks up against Nginx.

"My Xen and the Art of Rails Deployment Talk Slides" by Bernie Thompson

Sun, 20 May 2007 15:44:18 +0000

Thanks for making these slides available for those who couldn't be there! Thank you!

"My Xen and the Art of Rails Deployment Talk Slides" by Rufo Sanchez

Sun, 20 May 2007 13:14:43 +0000

Ezra, Thanks for the great presentation - many of us didn't stick around as we wanted to get into the design talk before they shut the doors, but as last year your talk was filled with tons of juicy nuggets. Really good stuff. Thanks! Rufo

My Xen and the Art of Rails Deployment Talk Slides

ezmobius — Sun, 20 May 2007 00:53:16 +0000

Here are my slides from the talk I gave today at Railsconf2007.

Xen and the Art of Rails Deployment