I am new to mongo, one of the first things it appears needs to be done is to create mongo replica sets as this avoids mongo write locking issues.
I set up mongo on AWS by getting mongo off the AWS Marketplace (mongo on marketplace is tuned for AWS)
What I dont know is how i go about setting up mongo replica, if I purchase another mongo instance via the marketplace, they will no doubt be separate instances, not replicas of the same one.
So given that I currently have one EC2 running mongo, what would the procedure be to convert this into a replication, so I always write to one server and always read from another.
I have read the instructions here: http://docs.mongodb.org/manual/tutorial/convert-standalone-to-replica-set/
But I am not confident that I understand what is going on there. Not sure what the dbpath is etc.
any help would be greatly appreciated in getting this up and working.