Supporting full distributed ACID transactions is the holy grail for databases, especially if you want them with minimal performance impact. For single instance settings we guarantee full ACID semantics and in a cluster setting ArangoDB supports atomic operations. Getting full distributed transactions working and minimizing their performance impact on writes is something we are still investigating. The new streaming transactions API in v3.5 brings also improvements to handling of transactions in a clsuter but are not distribuzed transactions.
For more details please see our docs https://www.arangodb.com/docs/stable/transactions-transactio...
