I saw a talk mentioning the use of append-only transactions in a NoSQL database however I was wondering if there was a different way that is more widely used in industry.
<a href="https://www.advent.com/solutions/geneva-for-hedge-funds/" rel="nofollow">https://www.advent.com/solutions/geneva-for-hedge-funds/</a><p>Stores ledgers and transactions of any instrument: currencies, stocks, bonds, etc.<p>It's developed over the past 30 years, requires financial operations staff to operate. It has a server and client, has an API available.<p>It's expensive to run for startups and hard to transition out of once you use it.