Divergent physical design tuning for replicated databases
Mariano P. Consens, Kleoni Ioannidou, Jeff LeFevre, Neoklis Polyzotis · 2012
We introduce divergent designs as a novel tuning paradigm for database systems that employ replication. A divergent design installs a different physical configuration (e.g., indexes and materialized views) with each database replica, specializing replicas for different subsets of the workload. At runtime, queries are routed to the subset of the replicas configured to yield the most efficient execution plans. When compared to uniformly designed replicas, divergent replicas can potentially execute their subset of the queries significantly faster, and their physical configurations could be initialized and maintained(updated) in less time. However, the specialization of divergent replicas limits the ability to load-balance the workload at runtime.