title: Redis Vs RabbitMQ as a data broker/messaging system in between Logstash and elasticsearch
body: <p>We are defining an architecture to collect log information by Logstash shippers which are installed in various machines and index the data in one elasticsearch server centrally and use Kibana as the graphical layer. We need a reliable messaging system in between Logstash shippers and elasticsearch to grantee the delivery. What factors should be considered when selecting Redis  over RabbitMQ as a data broker/messaging system in between Logstash shippers and the elasticsearch or  vice versa?</p>