[ http://issues.apache.org/jira/browse/HADOOP-334?page=comments#action_12447570 ] Doug Cutting commented on HADOOP-334: -------------------------------------
> we do not need to clone all the nodes from a node to its root, we could clone > only the node that is being modified I wonder whether this optimization is worthwhile. It makes things more stateful, for example, we can't have two separate snapshots live at once. However I don't know that we'll ever need to... > Redesign the dfs namespace datastructures to be copy on write > ------------------------------------------------------------- > > Key: HADOOP-334 > URL: http://issues.apache.org/jira/browse/HADOOP-334 > Project: Hadoop > Issue Type: Improvement > Components: dfs > Affects Versions: 0.4.0 > Reporter: Owen O'Malley > Assigned To: Konstantin Shvachko > > The namespace datastructures should be copy on write so that the namespace > does not need to be completely locked down from user changes while the > checkpoint is being made. -- 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
