MongoDB

In some cases MongoDB handles the job much better than MySQL or PostgreSQL.

MongoDB uses Mozilla’s SpiderMonkey JavaScript engine.

It is a document database (NoSQL), not a relational (SQL) database.

Practical scale notes from experience:

• Works well with databases up to about 300 GB.
• Data throughput of 100 MB/s and more is realistic.

Structure

• MongoDB consists of databases.
• Databases consist of collections.
• Collections consist of documents.

Documents are stored in BSON (binary JSON). Extended JSON is used to represent BSON data types.

Default databases

• admin
• local
• config

Clients and GUI

• MongoDB Shell and utilities — mongod, mongo / mongosh, export/import/dump.
• open_in_new Robo 3T — GUI client.