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10 MongoDB Tips From Engine Yard Data Team

Most of them are just common sense.

Config servers are critical to the health of your cluster.  You MUST have 3 configuration servers in a sharded production environment. NEVER delete their data, always make sure you back them up frequently, and refer to them, if you can, by name using an /etc/hosts file (this will make your cluster more resilient).

Config servers are light processes but they must also live on 64-bit instances. Don’t put all 3 config servers in the same instance!

Original title and link: 10 MongoDB Tips From Engine Yard Data Team (NoSQL database©myNoSQL)