CODEWITHSUNDEEP
databasemongodbperformancesharding
Dan D.
Dan D.

Reputation: 8557

MongoDB sharding, any bottleneck at 'mongos' the MongoDB router?

To increase performance for MongoDB, sharding the database is rather necessary. However, all connections and queries go through a 'mongos' (MongoDB router).

The MongoDB router is the only one in the sharding architecture, could that be a bottleneck and break down the whole sharded cluster?

Upvotes: 1

Views: 382

Answers (1)

D. SM
D. SM

Reputation: 14480

The MongoDB router is the only one in the sharding architecture

You can (and should) run multiple mongos nodes. mongos can be colocated on the servers that run mongods, and in fact this is a common deployment strategy, because mongos have relatively low resource requirements. That said, if the server overall is experiencing resource issues (for example, high network load, or a large number of files open), then mongos could be affected even though the load may have originated elsewhere (such as in the mongod running on the same machine).

could that be a bottleneck

mongos is generally quite efficient, though you should test it for your particular requirements.

and break down the whole sharded cluster?

A single mongos instance is a single point of failure, which is why a production deployment should have multiple mongos instances running.

Upvotes: 1

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