What transaction type should be performed to completely replace existing data in a dataset with a new batch of data in Foundry?

To completely replace existing data in a dataset with a new batch of data in Foundry, the correct transaction type is a snapshot. This transaction is designed to capture the current state of a dataset at a specific point in time, effectively overwriting any previous data. When you perform a snapshot, you ensure that the old data is entirely replaced by the new batch, providing a clear and defined change in the dataset.

Using a snapshot is beneficial in scenarios where it is crucial to maintain data integrity, as it allows for a restore point if needed. Additionally, snapshots can help in managing historical data by allowing you to keep track of different versions over time.

Other transaction types like appending, deleting, or updating would not fully achieve this goal. Appending adds data to the existing dataset without removing any previous information, deleting would remove data but not efficiently replace it, and updating typically modifies specific records without complete replacement. Thus, utilizing the snapshot approach is the most effective and efficient method for replacing all the data in the dataset.