MongoDB: The Definitive Guide is now available in bookstores everywhere! (Or at least on Amazon.) Please pick up a copy! Some interesting things I learned about the process of publishing: There are professional indexers who write the index. This amazes me, because we had to proofread our index and I’ve never been so bored in [...]
Suppose your application is happily talking to MongoDB and your laptop battery runs out. Or your server bursts into flame. Or velociraptors attack your data center. What now? To bring your server back up, read through the text until you get to a bold question. Click on the answer that best matches your situation to [...]
I’ll be giving an O’Reilly webcast, Scaling with MongoDB, on Friday (9/17). Please sign up if you’re interested in learning some more advanced optimization than what this post gets into. This webcast is, in part, to pimp MongoDB: The Definitive Guide, which will be coming out next week! These are a few basic tips on [...]
Writing an application on top of a framework on top of a driver on top of the database is a bit like playing telephone: you say “insert foo” and the database says “purple monkey dishwasher.” mongosniff lets you see exactly what the database is hearing and saying. It comes with the binary distribution, so if [...]
At LinuxCon, a guy took a look at me and said, “So, MongoDB was developed by college students, huh?” No, it was not. I couldn’t distribute my way out of a paper bag, which is why I’m not designing the database. A lot of people have been curious about where MongoDB came from, so here [...]
MongoDB feels a lot like a relational database: you can think of documents as rows, do ad hoc queries, and create indexes on fields. There are, however, a ton of differences due to the data model, scalability considerations, and MongoDB’s youth. This can lead to some not-so-pleasant surprises for users. We (the developers) try to [...]
This post assumes you know what replica sets and sharding are. Step 1: Don’t use sharding Seriously. Almost no one needs it. If you were at the point where you needed to partition your MySQL database, you’ve probably got a long ways to go before you’ll need to partition MongoDB (we scoff at billions of [...]
This post assumes that you know what replica sets are and some of the basic syntax. In part 1, we set up a replica set from scratch, but real life is messier: you might want to migrate dev servers into production, add new slaves, prioritize servers, change things on the fly… that’s what this post [...]
If you want to jump right into trying out replica sets, see Part 1: Master-Slave is so 2009. Replica sets are basically just master-slave with automatic failover. The idea is: you have a master and one or more slaves. If the master goes down, one of the slaves will automatically become the new master. The [...]
Replica sets are really cool and can be customized out the wazoo, so I’ll be doing a couple of posts on them (I have three written so far and I think I have a few more in there). If there’s any replica-set-related topic you’d like to see covered, please let me know and I’ll make [...]
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