It is very easy to use and configure this tool

It's resource consumption is very less and provides flexibility to control parsing as well as basic optimization parameters

I have used Fluentd on real-time distributed logging machines hosted on cloud to gather raw logs, filter logs, parse raw logs to well-formed JSON, forward all well-formed JSON logs to central fluentd machine (with backup node) central fluentd machine acts as an intermediate node which further forwards logs to the elastic search cluster master node. I had configured Kibanna and Elast alerts on master elastic search node to view and get real time business alerts.