VietMX Staff asked 3 years ago
Capped collections allow you to define a fix length/size collection. After the size/no of documents have been reached it will override the oldest document to accommodate new documents. It is like a circular buffer. Capped collections support high-throughput operations that insert and retrieve documents based on insertion order.
Consider the following potential use cases for capped collections:
- Store log information generated by high-volume systems. Inserting documents in a capped collection without an index is close to the speed of writing log information directly to a file system.
- Cache small amounts of data in a capped collections.
