[ https://issues.apache.org/jira/browse/HDFS-1362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wang Xu updated HDFS-1362: -------------------------- Attachment: HDFS-1362.4_w7001.txt I updated the patch based on the reconfiguration mechanism provided by HADOOP-7001. And now it only tries to add the new dirs in configuration files and is triggered by configuration update. > Provide volume management functionality for DataNode > ---------------------------------------------------- > > Key: HDFS-1362 > URL: https://issues.apache.org/jira/browse/HDFS-1362 > Project: Hadoop HDFS > Issue Type: New Feature > Components: data-node > Reporter: Wang Xu > Assignee: Wang Xu > Attachments: HDFS-1362.4_w7001.txt, HDFS-1362.txt, > Provide_volume_management_for_DN_v1.pdf > > > The current management unit in Hadoop is a node, i.e. if a node failed, it > will be kicked out and all the data on the node will be replicated. > As almost all SATA controller support hotplug, we add a new command line > interface to datanode, thus it can list, add or remove a volume online, which > means we can change a disk without node decommission. Moreover, if the failed > disk still readable and the node has enouth space, it can migrate data on the > disks to other disks in the same node. > A more detailed design document will be attached. > The original version in our lab is implemented against 0.20 datanode > directly, and is it better to implemented it in contrib? Or any other > suggestion? -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.