Keeping the join as a materialized view may be handy if a parallel data store is utilized to hold two relations r and s and we need to connect them. In terms of total throughput, space use, and...

Keeping the join as a materialized view may be handy if a parallel data store is utilized to hold two relations r and s and we need to connect them. In terms of total throughput, space use, and response time to user requests, what are the advantages and costs of this approach?