如何使用CDH4和纱线查看Hadoop工作历史和日志?

I downloaded the CDH4 tar for Hadoop with Yarn, and jobs are running fine, but I can't figure out where to view the logs from my job. In MRv1, I simply went to the JobTracker web app, and it had the job history. Individual jobs' logs were accessible from here as well, or by going to logs/userlogs directory. I downloaded the CDH4 tar for Hadoop with Yarn,