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Wang Xu commented on HDFS-1362: ------------------------------- Hi Uma, I will try that in days. > 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 > Affects Versions: 0.23.0 > Reporter: Wang Xu > Assignee: Wang Xu > Fix For: 0.24.0 > > Attachments: DataNode Volume Refreshment in HDFS-1362.pdf, > HDFS-1362.4_w7001.txt, HDFS-1362.5.patch, HDFS-1362.6.patch, > HDFS-1362.7.patch, HDFS-1362.8.patch, 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. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira