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From Todd Lipcon <t...@cloudera.com>
Subject Re: Status of CheckpointNode and BackupNode
Date Mon, 15 Oct 2012 20:26:47 GMT
Agreed, it's been a maintenance burden, and no one using it or actively
maintaining it (except for those of us working on other areas of the code
who have to spend time maintaining it).


On Mon, Oct 15, 2012 at 12:12 PM, Eli Collins <eli@cloudera.com> wrote:

> 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

Todd Lipcon
Software Engineer, Cloudera

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