AWS Database Migration Service (AWS DMS) helps you migrate databases to AWS quickly and securely. With this launch, AWS DMS now supports parallel full load with the range segmentation option when using Amazon DocumentDB (with MongoDB compatibility) and MongoDB as a source. You can accelerate the migration of large collections by splitting them into segments and loading and unloading the segments in-parallel in the same migration task. This feature could improve the migration performance by up to 3x.
Source:: Amazon AWS