My previous Tutorial about puppet was just an introduction to puppet configuration management tool.
Now there are multiple steps involved whenever a puppet agent of any node connects to a puppet master server for fetching data. Type the characters you see in the picture above; if you can't read them, submit the form and a new image will be generated. Puppet is an IT management software product, available in enterprise and open source versions, that allows administrators to automate repetitive tasks, quickly deploy applications, and manage configuration changes within an infrastructure. NJVID is a state-of-the-art digital media repository service for streaming and preservation of academic and research media for higher education. All the nodes will run on instances of Ubuntu 10.04, though they will have different packages installed. I have some familiarity with Chef from previous projects, though I don't consider myself an expert.
If you were starting this project today, what questions would you ask yourself to decide whether you should use Chef or Puppet for configuration management? At the Open Source Bridge in 2009, they had a panel of the authors and representatives of chef, puppet, bcfg2, cfengine, and automateit which you can watch on bliptv which has 1.75 hours of discussion about configuration management utilities. I think your not knowing the right questions to ask might stem from you not having too much experience working with either of them, once you start using them you'll start seeing the differences between them.
Chef has a DSL as well, the difference is that it is an internal Ruby DSL, where as Puppet's DSL is external.
The linked blog articles are very helpful starters for people looking into comparing chef and puppet. While my expertise is certainly in systems administration, my background is in programming. However, my team is full of systems administrators with little to no programming experience, aside from the occasional shell script.

I've also heard it been said many times that Chef is much more cloud-friendly than Puppet, but Puppet has made that a focus with their Puppet Enterprise product in the past year. Because of those above qualities, the stereotype (and it's often correct) is that you'll find Puppet to be more pervasive in the enterprise on physical machines, where Chef rules the startups in the cloud. Full disclosure, we do not use either of these, although we evaluated them internally while trying to decide on a configuration management system.
Keep in mind, too, that all the features in the world won't make up for a difficult interface, plus, it may expose problems that are specific to your infrastructure--i.e., what happens if config files are updated in a different order than expected? So that's my advice; Chef and Puppet are not all that difficult to get one server and one or two clients setup, and will give you first hand experience on both.
If there are people on your project who already have experience with Puppet, then I suggest you just use Puppet. The above is definitely a good guideline, I also like to ask these general questions whenever I am considering a new third party dependency. These are good indicators of the overall success of the project and can somewhat predict the life span. Age is either easy or hard to judge: Chef was started by a company that had been using Puppet but was dissatisfied with certain things. Try to find people who have been using either Chef or Puppet for more than a couple of months and ask them about their experiences. Not the answer you're looking for?Browse other questions tagged puppet configuration-management chef or ask your own question. Are configuration management tools (Puppet, Chef) capable of keeping installed packages up to date?
First appearance of the "wake up from a coma, discover the world has ended" trope? Called puppet agent, it will fetch data at regular intervals from the server(typically 30min by default).

This presentation discusses how Puppet is used as a tool for rapid deployment of virtual machines and for automating system updates. By providing cost effective media streaming and repository services, NJVID enables institutions to overcome the technical barriers in digitizing and making media available to users through a secure portal.
Chef and Puppet share many of the same domain terminology -- packages, resources, attributes, and so on, and they have a common history that stems from taking different approaches to the same problem.
Your best is going to be to start doing what you're trying to do and decide which tool you like the best.
Puppet has since added a pure-Ruby DSL as well recently, but it is not encouraged or recommended by puppet users, nor Puppet Labs. Personally I prefer chef because that was the first CM option I learned but in practice and taking into account the existing team strength in puppet I tend to go with puppet with the pure infrastructure projects whereas the applications team mostly DevOps are more biased towards chef. We have a number of folks in-house who are long-time Puppet users, and they have encouraged me to take a look. Whether a DSL is good or a bad choice is one of the biggest differences between chef and puppet.
Also big piece of Chef popularity in ROR community because Engineyard built their infrastructure on top of the Chef.
Puppet Agent: This is the daemon that will run on all the servers, which are to be managed using puppet. But much of the comparison information I've found, like this article, is a little outdated.
The link you posted to bitfield consulting's comparison has some good comments about this you should read if you haven't already.

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