Scaling databases for enterprise require to have to integrate wildly disparate data sources, satisfy stakeholders with competing expectations, and find the structure hidden in unstructured data.One has to carefully consider tradeoffs between data integrity and constant uptime, between.You may have a legacy system that stores data in tab-delimited files, unstructured text files coming from handwritten notes, and one or more conventional database management system and data from all of these sources needs to be read by and integrated into a single system.Read full article at : https://www.oreilly.com/ideas/insights-on-scaling-and-integrating-databases