The Advent wreath is a circular garland of evergreen branches representing eternity. On that wreath, five candles are typically arranged. During the season of Advent, one candle on the wreath is lit each Sunday as a part of the Advent services.
Combined DNA Index System. The Combined DNA Index System (CODIS) is the United States national DNA database created and maintained by the Federal Bureau of Investigation.
On each of the hosts in the cluster, an Oracle Database instance is launched that uses the shared storage structures to provide the logical database objects. Thus, the multiple database instances provide a common database access for the users. Users can access the same database from any of the instances. RAC is a high availability solution, but care should be taken when deciding to implement RAC. Oracle's original Grid vision represented a pool of database servers, storage and networks in an inter-related resource platform.