Effect of inverted index partitioning schemes on performance of query processing in parallel text retrieval systems
Source: Lecture Notes in Computer Science, Springer, Volume 4263, Istanbul, Turkey, p.717-725 (2006)
Abstract: Shared-nothing, parallel text retrieval systems require an inverted index, representing a document collection, to be partitioned among a number of processors. In general, the index can be partitioned based on either the terms or documents in the collection, and the way the partitioning is done greatly aﬀects the query processing performance of the parallel system. In this work, we investigate the eﬀect of these two index partitioning schemes on query processing. We conduct experiments on a 32-node PC cluster, considering the case where index is completely stored in disk. Performance results are reported for a large (30 GB) document collection using an MPI-based parallel query processing implementation.