With support of multi-document ACID transactions in MongoDB, is MongoDB now suitable for financial applications? [closed]

No, it is not safe to say that MongoDB can now be used for financial applications involving financial transactions such as payments.

The thing is, maybe it is OK for your situation and maybe it is not. It is largely a matter of opinion, regulations, and how much risk you are willing to take. That why it is not safe to make a blanket statement calling MongoDB "safe".

Some financial applications, such as banking or securities (stock) trading, have strong regulatory requirements regarding such things as security and auditability, and just because a database claims ACID compliance does not mean it meets these regulations, or that even if it does meet the requirements, it has been certified in a way acceptable to the regulators. ACID compliance is new to MongoDB, so there is a definite possibility of bugs causing data loss, just as there were in previous versions. While of course any database might have bugs, commercial ACID relational databases like Oracle and DB2 have a much longer and better track record of not loosing data, so depending on your financial application, MongoDB might not be acceptably reliable.

I could go on listing more and more considerations, but the point is there is no one-size-fits-all answer. Pinterest apparently stopped using MongoDB not just because of problems with cluster migration, but because they thought the supporting toolset was not sufficient for them to diagnose and resolve issues quickly and easily enough. That was a long time ago and surely things have gotten better, but does MongoDB have adequate tools to repel, detect, and recover from a state-sponsored attacker who wants to steal the billion dollars in assets your database is responsible for? Probably not.

Yes it is.If you check https://www.mongodb.com/industries/financial-services financial institutions are using mongoDB.And it does support scaling.https://www.mongodb.com/collateral/mongodb-multi-document-acid-transactions

If you see trend mongoDB has been developing features of RDBMS in pastin 3.4 they added ViewsThey also added mongosqld for business intelligence.

Earlier people were hesitant to use mongoDB where they required ACID transactions.But now they can rely on it. The overhead of ACID transaction is also negligible but yes it will depend on the developer to ensure that he has coded accordingly