Machine Learning with Apache Spark Quick Start Guide

Master/slave architecture

As a means of providing resilience and load balancing read requests, potentially, a master/slave architecture would have been employed whereby data is automatically copied from the master database server to physically distinct slave database server(s) utilizing near real-time replication. This technique requires that the master server be responsible for all write requests, while read requests could be offloaded and load balanced across the slaves, where each slave would hold a full copy of the master data. That way, if the master server ever failed for some reason, business-critical read requests could still be processed by the slaves while the master was being brought back online. This technique does have a couple ...