Database Reference
In-Depth Information
Configuring a mongos instance
After configuring the configuration servers, we should bind them to the core module of
clustering. The
mongos
instance is responsible for binding all modules and parts together
to make a complete sharding core.
This module is simple and lightweight, and we can host it on the same machine that hosts
other modules, such as configuration servers. It doesn't need a separate directory to store
data. The
mongos
process uses port
27017
by default, but you can change the port using
the configuration parameters.
To define the configuration servers, you can use the configuration file or command-line
parameters. Create a new file using your text editor in the
/etc/
directory and add the fol-
lowing configuring settings:
configdb = cfg1.sharding.com:27019, cfg2.sharding.com:27020
cfg3.sharding.com:27021
To execute and run the
mongos
instance, you can simply use the following command:
mongos -f /etc/mongos.conf
After executing the command, you should see an output like the following screenshot:
