Created
March 11, 2012 08:28
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Getting a random document from MongoDB collection
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| var count = db.collections.count() | |
| var rand = function(){return Math.floor( Math.random() * count )} | |
| db.collection.find().limit(-1).skip(rand()).next(); |
agreed; we have something like ~8 million records in one database, and skipping deep in to the collection takes almost 2 seconds (depending on the skip value). not ideal in most production environments.
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Skip is a very inefficient function in Mongodb.