They had data in multiple data stores — and wanted Polyglot persistence but got poly lot of headaches instead. Then they switched to MarkLogic’s multi-model database.
In banking every business line is its own master in its domain and its data is subject to its rules. Master Data Managment needs to consider all these masters (pardon the pun) but strong barriers prevent unifying all these silos. A metadata repository to bridge all these sources of truth is key.