As far as I know, Hadoop 2.6 supports disk hot-swapping on a DataNode without restarting the DataNode. Roughly you need to do two operations: 1) change dfs.datanode.data.dir in the DataNode configuration to update according to your removed/added disks; 2) let the DataNode reload its configuration.
Please google and checkout related docs for this feature. Hope this helps. Regards, Kai From: yaoxiaohua [mailto:[email protected]] Sent: Friday, January 08, 2016 11:24 AM To: [email protected] Subject: dfs.datanode.failed.volumes.tolerated change Hi, The datanode process shutdown abnormally, I set dfs.datanode.failed.volumes.tolerated =2 in hdfs-site.xml. Because I found one disk is fail to access. Then restart the datanode process, it works. One day later, we replace a good harddisk , and create folder and chown to hadoop. Then I want to know if I don't restart datanode process, when the datanode can know that The disk is good now? May I have to restart datanode process to update this? Env:Hadoop 2.6 Best Regards, Evan
