I also was thinking about RDBMS as event store. MySQL has great performance, and with it's support for JSON datatype it becomes even easier to store arbitrary data. With metadata stored in regular columns (like created_at TIMESTAMP, event_type VARCHAR, aggregate_id INT) you also get lots of abilities to SELECT only required events in proper order. With indexes on metadata columns, SELECTs become fast (although it goes at a price of slightly degraded WRITE performance). Having atomicity in place is another big benefit of RDBMS.
As of business language: I literally think it's a matter of communication skills and domain knowledge spread within the team. At least it's much more about that that about technology in use. I've been talking to business leaving tech questions aside for years (and, well, that means, years before I first heard about ES)
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Thanks for a quick reply, Barry!
I also was thinking about RDBMS as event store. MySQL has great performance, and with it's support for JSON datatype it becomes even easier to store arbitrary data. With metadata stored in regular columns (like created_at TIMESTAMP, event_type VARCHAR, aggregate_id INT) you also get lots of abilities to SELECT only required events in proper order. With indexes on metadata columns, SELECTs become fast (although it goes at a price of slightly degraded WRITE performance). Having atomicity in place is another big benefit of RDBMS.
As of business language: I literally think it's a matter of communication skills and domain knowledge spread within the team. At least it's much more about that that about technology in use. I've been talking to business leaving tech questions aside for years (and, well, that means, years before I first heard about ES)