This is an objective summary of the features and drawbacks of Hadoop/HDFS as an analytics platform and compare these to the cloud-based Snowflake data warehouse.
Whichever way you wish to ensure that a database, when built, has all the data that will enable it to function properly, there are reasonably simple ways of doing it.
With the multiplicity of tests of all types that need to be performed on an application, it's important to understand where one ends and another begins.