Architecture
The 11:47am question real-time rails ask of your ledger
What was the cash position at 11:47am? On a snapshot-based model the honest answer is an interpolation between two saved states. Real-time rails turned that guess into a liability, and the fix is to stop storing a position at all and fold an immutable event log into the answer. The event log is not free, and most teams have not put the bill on the budget.
Lead essay
Start here when you want the current Doric argument instead of a chronological archive.
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