Avaliação da sobrecarga de replicação de bancos de dados relacionais para alta disponibilidade

Abstract

The aim of this work was to evaluate the replication overhead of relational databases, using two different transactional architectures in comparison. One architecture contains only one centralized database and the other contains two databases in strong mutual replication. This overhead assessment was based on the main Hardware metrics such as CPU utilization, RAM, Disk Input and Output, and Network traffic, in addition to the deployed RDBMS's own metrics which, considering two test scenarios, culminated in a better performance for the centralized database architecture. The first test scenario simulated a short duration transaction execution while the second test scenario simulated a long duration execution using, in both scenarios, a transactional load benchmark to obtain the metrics under evaluation. For the development of such activity, only open source tools were used in order to facilitate the reproduction of this work in future researches.