From the project page:
Twitter Ambrose is a platform for visualization and real-time monitoring of MapReduce data workflows. It presents a global view of all the map-reduce jobs derived from your workflow after planning and optimization. As jobs are submitted for execution on your Hadoop cluster, Ambrose updates its visualization to reflect the latest job status, polled from your process.
Ambrose provides the following in a web UI:
- A chord diagram to visualize job dependencies and current state
- A table view of all the associated jobs, along with their current state
- A highlight view of the currently running jobs
- An overall script progress bar
One of the items that Russell Jurney reports on in his summary of the Hadoop Summit 2012.
Limited to Pig at the moment but looks quite useful.