[ http://issues.apache.org/jira/browse/HADOOP-702?page=comments#action_12448632 ] Yoram Arnon commented on HADOOP-702: ------------------------------------
read-write snapshots are possible, maybe even 'neat' from a technology standpoint. They're just hard to manage. I know of no file systems then implement them though they're common in revision control systems. I recommend against it in hdfs. > DFS Upgrade Proposal > -------------------- > > Key: HADOOP-702 > URL: http://issues.apache.org/jira/browse/HADOOP-702 > Project: Hadoop > Issue Type: New Feature > Components: dfs > Reporter: Konstantin Shvachko > Attachments: DFSUpgradeProposal.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. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
