Workload Isolation with Atlas and Charts | MongoDB Blog` MongoDB replica sets are used to ensure availability of databases by having multiple servers work together. Workload isolation is a key advantage of using replica sets, allowing different workloads to run independently without interfering with each other. This is particularly useful in systems that have multiple conflicting workloads, such as an e-commerce application with orders processing and machine learning algorithms running simultaneously. To achieve workload isolation, secondary nodes can be used for reads while primary nodes handle writes, and additional analytics nodes can be added to guarantee isolation even if the primary node goes down. MongoDB Charts now supports workload isolation in Atlas by default, configuring data sources to read from secondary nodes or analytics nodes, providing high isolation and resilience for data analysis and visualization workloads.