I have just recently started working with hadoop and I have a few questions I would like to submit to the community. 1. Is there any remote-able interface to the jobtracker, so that I can create an application that would remotely be able to track jobs. Ie something like a rest or XMLRPC interface?. 2. Is it possible to attach additional metadata to a job for tracking purposes, we have a set of tasks that result in a large number of jobs per task, and I would like to tag jobs with an overall task id for tracking purposes. A usage case would be a nutch crawl, our application uses nutch to scan domains on demand, each scan is a distinct task, and nutch spawns a set of mapred tasks for each stage of the crawl. I would like to be able to determine completion status for a set of nutch crawls using an interface to job-tracker.