Due to reduced need of Teradata administration, Teradata provide huge cost advantages, especially when it comes to staffing DB admins. If data grows rapidly, the system can expand easily to accommodate it
The cost saves are due to these tasks not needed to be done:
Reorganize data or index space.
Pre-allocate table/index space and format partitioning. While it is possible to have partitioned indexes in Teradata, they are not required.
Pre-prepare data for loading (convert, sort etc.,)
Unload/Reload data spaces due to expansion. With Teradata, the data can be redistributed on the larger configuration with no offloading and reloading required.
Write or run programs to split input source files into partitions for loading.