Tip18: Don't use gridfs for small binary data

Generally, gridfs requires two queries: The first query is the file metadata, and the second query is the file content. Therefore, if you use gridfs to save small filesProgramBecause gridfs generally stores large files in a database.
Gridfs is mainly used to store a large amount of data, which is about to exceed a single document. Based on experience, it is impossible to load everything on the client at a time if it is too large. Therefore, gridfs is a candidate for large-scale streaming data. Images, sounds, and even video clips should be loaded to the client at a time.

As shown in this figure, a big data is divided into multiple small chunks.