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I have no actual information about this migration but I wouldn’t be surprised to learn that the databases that are being consolidated are for some minor role or are separate instances with duplicate data for analytics or whatever. It sounds wildly unlikely that they are going to smush together all their customer accounts in one MongoDB instance. As well as being a huge technic challenge I’m sure regulators would have something to say about this.

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TBH I think so, too. I guess this is just a glorified global network drive to put all the different, country-specific documents like Excel sheets, Word docs, PDFs and some such.

https://youtu.be/GI5kwSap9Ug?t=63

This is very likely. Most banks have stupid-huge quantities of products and services, each with extremely elaborate requirements and data storage needs. “65 relational databases” might well only represent a few percentage points of HSBC’s data footprint.

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