We do a lot of importing data from a large variety of data sources, so we use lots of MongoDB for persisting data and Elasticsearch for fast aggregations and qu

We do a lot of importing data from a large variety of data sources, so we use lots of MongoDB for persisting data and Elasticsearch for fast aggregations and queries. We have quite a lot of data, but we haven't ran into any problems with elasticsearch/mongodb. A lot of the data we import has backing PostgreSQL databases from partner companies which adds some extra redundancy.