In one of the youtube videos, I heard that Hadoop doesn't support transaction system but supports operations.
Example for Transaction is like transferring of funds from one account to another account in banking.
Here amount should be debited in one account and it should be successfully credited to the other account. Than only the transactions is said to be successful. During this process, if anything fails the transaction needs to be rolled back to to the original state.
Hadoop doesn't support such kind of transactions and RDBMS is the only option for such kind of business activities with respect to data integrity.
Is it true?