Hi,

I'm having a MogoDB Shard cluster in my production environment. The mongoDB shard cluster is being resided in AWS Cloud under EC2 Instances. Following diagram illustrates big picture of the MongoDB sharded Cluster.

According to the production environment, I'm maintaining a cluster environment including two shards with replica set.

In this mongoDB which includes total around 30GB of data, but I do observe very high network in/out in between those two master nodes in the cluster and the Mongos server(Green coloured servers). This huge network traffic is being progressed with 25Mbps for continuous 10hours everyday, starting each day @5.05am UTC and it transfers around 2TB of data in total daily. This is massive cost hitting network traffic and now it's being terrible.

Following network traffic monitoring dashboard gives the clear idea of spikes.

Need to find out a solution immediately for this unwanted network traffic. Any help would be greatly appreciated.

Thanks.