Node.js, MongoDB, and AngularJS Web Development

Using Capped Collections

Capped collections are fixed-size collections that insert, retrieve, and delete documents based on insertion order. A capped collection can support high-throughput operations. Capped collections work much like circular buffers in that once a collection fills its allocated space, it makes room for new documents by overwriting the oldest documents in the collection.

Capped collections can also be limited based on a maximum number of documents. This is useful for reducing the indexing overhead that can occur when storing large numbers of documents in a collection.

Capped collections are extremely useful for rotating event logs or caching data because you do not need to worry about expending the overhead and effort of implementing ...