4 ms·

It's bad enough to not be able to roll it back, but to also not thoroughly test? Unfathomable.

• dx034 9y ago
  The problem with core banking systems is that they're nearly important to test. There's no distributed system, you always need one single source of truth for the whole bank (the ledger). Moving part of that is only possible if you keep shadow accounts in the old system. That's also why live migrations aren't possible and need at least one night downtime.
  • dhimes 9y ago
    Can't you set up fake accounts with fake data? Random numbers? I do that all the time is a different context. I have a bunch of scripts I run that populate a database with nonsense. So not shadow accounts, but fake accounts.