Major Description
The most important part of upgrading HDFS to Ozone is getting good visibility to the current cluster. We should be able to answer questions that admins might have; the admin might decide to upgrade only directories which are old to Ozone, or might decide to upgrade directories with millions and millions files. The ability to ask these questions and understand that information is vital, This JIRA proposes to add HDFS metadata explorer that will allow admins to make an informed decisions while upgrading to Ozone.