The Free On-line Dictionary of Computing (30 December 2018):

data warehouse
CDW
data warehousing

    (Or corporate data warehouse, CDW) Any system for
   storing, retrieving and managing large amounts of data.  Data
   warehouse software often includes sophisticated compression
   and hashing techniques for fast searches, as well as
   advanced filtering.  A data warehouse is often a relational
   database containing a recent snapshot of corporate data and
   optimised for searching.  Planners and researchers can use
   this database without worrying about slowing down day-to-day
   operations of the production database.  The latter can be
   optimised for transaction processing (inserts and updates).

   Compare data mart.

   (2007-05-16)