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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4114) Deprecate the BackupNode and CheckpointNode in 2.0
Date Thu, 08 Nov 2012 19:26:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13493423#comment-13493423
] 

Eli Collins commented on HDFS-4114:
-----------------------------------

{quote}
What do you mean? HDFS-3625 "touched" it just in July.
I actually made BackupNode work for Hadoop-0.22. I don't wee why it is not possible for 0.23.
{quote}

I mean that it hasn't seen development activity get committed aside from fixing the tests
(eg HDFS-3625), I've not seen any users try it etc, none of the active developers maintain
it, etc.

I don't see how the BackupNode is useful in its current state (just a node that you can stream
edits to). The goal for the BackupNode was to evolve from it's current state to become a StandbyNode,
but that effort is, several years later, not made much progress. Eg HDFS-2064 has been patch
available for a year on a branch that, IIUC, no one plans to release from. The only 0.22 based
system I'm aware of has since moved off of 0.22.

                
> Deprecate the BackupNode and CheckpointNode in 2.0
> --------------------------------------------------
>
>                 Key: HDFS-4114
>                 URL: https://issues.apache.org/jira/browse/HDFS-4114
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>
> Per the thread on hdfs-dev@ (http://s.apache.org/tMT) let's remove the BackupNode and
CheckpointNode.

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