DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   Redundant Array of Inexpensive Servers
   RAIS
      <architecture> (RAIS) The use of multiple servers to provide
      the same service in such a way that service will still be
      available if one or more of the servers fails.  The term may
      or may not imply some kind of load balancing between the
      servers.  See cluster.
      The term "RAIS" follows RAID, which describes schemes for
      resilient disk storage.
      (2007-02-28)