10gen is hiring a lot of people straight out of college, so I thought this guide would be useful. Basically, the idea is: you have found and fixed a bug (so you’ve cloned the mongo repository, created a branch named SERVER-1234, and committed your change on it). You’ve had your fix code-reviewed (this page is [...]
I’ve been looking at Clang and they define lexer tokens in a way that I thought was clever. The challenge is: how do you keep a single list of language tokens but use them as both an enum and a list of strings? Clang defines C token types in a file, TokenKinds.def, with all of [...]
I just started working on MongoDB: The Definitive Guide, 2nd Edition! I’m planning to add: Lots of ops info Real-world schema design examples Coverage of new features since 2010… so quite a few However, I need your help on the schema design part! I want to include some real-world schemas people have used and why [...]
My interns are leaving today and I think the most important skill they learned this summer was how to use git. However, I had a hard time finding concise references to send them about my expectations, so I’m writing this up for next year. How to Create a Good Commit A commit is an atomic [...]
Shard tagging is a new feature in MongoDB version 2.2.0. It’s supposed to force writes to go to a local data center, but it can also be used to pin a collection to a shard or set of shards. Note: to try this out, you’ll have to use 2.2.0-rc0 or greater. To play with this [...]
What are some good ops blogs? Server Density does a nice weekly roundup of sys admin posts, but that’s about all I’ve found. So, anyone know any other good resources? The more basic the better. In exchange, here are my top-10 “I’m totally doing something productive and learning something new” blogs: Programming Daniel Lemire’s Blog [...]
I’ve been doing replica set “bootcamps” for new hires. It’s mainly focused on applying this to debug replica set issues and being able to talk fluently about what’s happening, but it occurred to me that you (blog readers) might be interested in it, too. There are 8 subjects I cover in my bootcamp: Elections Creating [...]
In The Princess Bride, every night the Dread Pirate Roberts tells Westley: “Good night, Westley. Good work. Sleep well. I’ll most likely kill you in the morning.” Let’s say the Dread Pirate Roberts wants to optimize this process, so he stores prisoners in a database. When he captures Westley, he can put: > db.prisoners.insert({ … [...]
A bit of housekeeping: I’ve changed domain names, now this site is kchodorow.com, not snailinaturtleneck.com. Old links should still work, they’ll just be permanent redirects to the new domain. Please let me know if you come across any issues! Why the change? kchodorow.com sounds more professional and is shorter. Also, I’m after fame and glory [...]
Got a secret project on machine A and too cheap to get a Github private repo? Clone it directly on machine B with: $ git clone ssh://user@A/absolute/path/to/repo/ Replace “user” with your username on A, “A” with the actual hostname of A, and “/absolute/path/to/repo/” with the absolute path to the git repository.
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