Interested in learning more about scaling MongoDB? Pick up September’s issue of PHP|Architect magazine, the database issue! I wrote an article on scaling your MongoDB database: how to choose good indexes, help handle load using replication, and set up sharding correctly (it’s not PHP-specific).
If you prefer multimedia, I also did an O’Reilly webcast on scaling MongoDB, which you can watch below:
Unfortunately, I had some weird lag problems throughout and at the end it totally cut my audio, so I didn’t get to all of the questions. I asked the O’Reilly people to send me the unanswered questions, so I’ll post the answers as soon as they do (or you can post it again in the comments below).