mongodb - multiple instances of Mongo DB on same server

Question

I am working with Mongo DB and I am a newbie to it. I am about to install it on a server specifically for Mongo.

I would like to create 2 instances of it - 1 to support a QA environment, the other to support a Staging Environment.

I am more familiar with SQL Server where I can create multiple instances.

Is it possible to do the same with Mongo DB and if so, how?

Answer 1

The aforementioned answer is not a recommended way to run multiple instances (especially when the servers might be running at the same time) as it will lead to usage of the same config parameters like for example logpath and pidfilepath which in most cases is not what you want.

Please, consider creating dedicated mongod configuration files like mongod-QA.conf and mongod-STAGE.conf. In these files you may want to provide dbpath, logpath folders, bind_ip, port and pidfilepath specific to each mongod instance and that will not affect each other.

After these steps you are good to trigger two instances as follows

mongod --config <path-to>/mongod-QA.conf
mongod --config <path-to>/mongod-STAGE.conf

You can find more details on mongodb docs page