What is meant by Centralized Repository?
The term used for Storage of metadata information in Hive.
Hive facilitates the analysis of large datasets stored in the Hadoop filesystem by organizing that data into tables that can be queried and analyzed using a dialect of SQL called HiveQL. The schemas that define these tables and all other Hive metadata are stored in a centralized repository called the metastore
please check this URl for more understanding Component Migration - MapR 4.0.x Documentation - doc.mapr.com
Retrieving data ...