"Fluentd" is an open-source tool to collect events and logs. 150+ plugins instantly enables you to store the massive data for Log Search (like ElasticSearch), Big Data Analytics, and Archiving (MongoDB, S3, Hadoop).
Fluentd in Action
"We use Fluentd to collect massive data logs for our platforms. Having developed a system based on Fluentd, we are now effectively monitoring and analyzing our services in real-time. We are very much satisfied with its flexibility, especially how easy it is to use in tandem with other systems."