Short for
Redundant Arrays of Inexpensive Databases
(Db), RAIDb is a standard for combining multiple
database instances into an
array of databases. RAIDb was derived from two
technologies; Redundant Arrays of
Inexpensive Disks (
RAID) and computing
clusters to provide better performance
and
fault tolerance than a single database would, with the benefits of a
distributed workload, load balancing, and caching. RAIDb is defined at three
different levels which vary the cost, performance and fault tolerances. The
levels include the following:
- RAIDb-0: full partitioning
- RAIDb-1: full replication
- RAIDb-2: partial replication where the user defines the degree of
replication of each database table.
Redundant Arrays of Inexpensive Databases was defined in September 2003 at
INRIA (Institut National De Recherche En Informatique Et En Automatique) by
Emmanuel Cecchet, Julie Marguerite, and Willy Zwaenepoel.
