Architecture and Components

This is a list of the components (processes) in the MongoDB server package.

• mongod - The core database process
• mongos - Sharding controller
• mongo - The database shell (uses interactive javascript)

• Import Export Tools
  • mongoimport
  • mongoexport
  • mongodump
  • mongorestore
  • bsondump

• mongofiles - the GridFS utility

• mongostat

MongoDB has two primary components to the database server.  The first is the mongod process which is the core database server.  In many cases, mongod may be used as a self-contained system similar to how one would use mysqld on a server.  Separate mongod instances on different machines (and data centers) can replicate from one to another.

Another MongoDB process, mongos, facilitates auto-sharding.  mongos can be thought of as a "database router" to make a cluster of mongod processes appear as a single database.  See the sharding documentation for more information.

See Also

• Mongo Concepts and Terminology