Distributed processing of time-constrained queries in CASE-DB
Sungkil Lee, Gültekin Özsoyoğlu · 1996
We develop and experimentally evaluate a real-time distributed relational prototype database system that permits the specification of time constraints for relational algebra queries and evaluates queries in parallel over distributed sites in a completely replicated data environment.We develop, implement and evaluate on multiple server sites iterative distributed query evaluation techniques.The risk of overspending the time constraint at each iteration is controlled using a probabilistic risk cent rol technique.The query execution plan is designed to restructure a query into an equivalent, esay-to-parallelize form, and distributed execution is achieved by multi-threaded processes and RPC calls.