Virtual Partitioning (VP) is a distributed database design technique that avoids physical partitioning table design. VP is adopted in Database Clusters to implement intra-query parallelism . VP is based on database replication and aims at designing a table partition dynamically, according to each query specification . The idea is to take advantage of the current configuration of the parallel execution environment, such as the number of nodes available, the tables of the query, the current load, and the available table replicas. Intra-query parallelism can be obtained through VP by rewriting a query into a set of sub-queries to be sent to different virtual partitions. At each node, the local sequential DBMS processes the sub-query on the specified virtual partition of the table. VP requires an extra query processing phase to compose the final result from the partial ones produced by the sub-queries. This way, a database that is not physically partitioned...
- 1.Lima AAB, Mattoso M, Valduriez P. Adaptive virtual partitioning for OLAP query processing in a database cluster. In: Proceedings of the 19th Brazilian Symposium on Database Systems; 2004. p. 92–105.Google Scholar