Creating TTL-based indexes

In this recipe, we will explore the expireAfterSeconds property of MongoDB indexes to allow automatic deletion of documents from a collection.

Getting ready

For this recipe, all you need is a mongod instance running. We will be creating and working on a new collection called ttlcol in the database mydb.

How to do it...

1. Ensure that our collection is empty:

db.ttlcol.drop()

2. Add 200 random documents:

for(var x=1; x<=100; x++){
  var past = new Date()
  past.setSeconds(past.getSeconds() - (x * 60))
  // Insert a document with timestamp in the...