Teradata vs Other RDBMS

Teradata: Shared nothing(Ex: Each VPROC is associated with one VDisk)
Other: Shared Everything

Process Million of Instructions per second
Process Thousands of Instructions per second

Stores billions of rows
stores millions of rows

unconditional parallelism(Each AMP works with its own drive)
Conditional Parallelism

Better storage and fast retrieval(using indexes)
fast retrieval only

bulk load utilities(BTEQ,FLOAD,MLOAD,TPUMP)
limited utilities