Mongdb replica set + query router

[Marcello A]

Hi All,
i'm testing a configuration with a replica set composed by 3 replicated server and without arbiters.

Do i have to install a query router to define in trasparent way a connection between the clients and the master server of this replica?

Thanks,
Marcello

[Asya Kamsky]

You don't need a query router, you just need to specify the replica set in your connection string to the driver.   All of your data is in that replica set.   Query router (mongos) is only necessary when you shard aka split your dataset across multiple shards/replica sets.

Asya

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[PBS]

All you can do is add readpreferrence base on your requirement. i.e. PrimaryPreferred/SecondaryPreferred or nearestone