> DFS Upgrade Proposal
> Key: HADOOP-702
> URL: https://issues.apache.org/jira/browse/HADOOP-702 > Project: Hadoop
> Issue Type: New Feature
> Components: dfs
> Reporter: Konstantin Shvachko
> Assigned To: Sameer Paranjpye
> Attachments: DFSUpgradeProposal.html, DFSUpgradeProposal2.html, DFSUpgradeProposal3.html, FSStateTransition.html, TestPlan-HdfsUpgrade.html
> Currently the DFS cluster upgrade procedure is manual.
> http://wiki.apache.org/lucene-hadoop/Hadoop_Upgrade > It is rather complicated and does not guarantee data recoverability in case of software errors or administrator mistakes.
> This is a description of utilities that make the upgrade process almost automatic and minimize chance of loosing or corrupting data.
> Please see the attached html file for details.