Log data provides the most granular view into what is happening across your systems, applications, and end users. Logs can show you where the issues are in real-time, and provide a historical trending view over time. Logs give you the whole picture.
In August 2012 Splunk released Splunk Storm, tailored for «organizations that develop and run their applications in the public cloud, using services such as Amazon Web Services (AWS), Heroku, Google App Engine, Rackspace, and others.» Splunk Storm claimed to provide «developers» with an easy-to-use, subscription version of the Splunk software. Since this grand launch of Splunk Storm, to meet the needs of the DevOps community, Splunk has decided to end of life Storm. In fact, as of yesterday Splunk has disabled all data inputs to Splunk Storm, and on April 1st (no this is not a bad April fools joke) they intend to shut down the service altogether.