Hey gang, Is anyone using the BackupNode and/or CheckpointNode? I'm not aware of anyone using them, and the only outstanding related jira is HDFS-2064, which has been open for over a year and doesn't seem to be making progress. For the past three years the code has only been maintained as part of other changes and test failures, which has frankly been a bit of a development tax. Back in 2008 in HADOOP-4539 the goal for the BackupNode was to eventually become a StandbyNode, it doesn't look like anyone is working on that. Users get confused as to whether to use the 2NN or the CheckpointNode, and what the point of the BackupNode is since it's not provide HA or evolved. Unless someone wants to push on their evolution and actively maintain them I don't think it makes sense to keep them in the tree. Thoughts?
Thanks, Eli
