Yes, you have to bounce datanode so that it can start using the disk. Also note that you have to tell datanode to use this disk via dfs.data.dir config parameter in hdfs-site.xml. Same with tasktracker, if you want tasktracker to use this disk for its temp output, you have to tell it via mapred-site.xml
2011/5/9 Pete Haidinyak <[email protected]> > Hi all, > When you add a disk to a Hadoop data node do you have to bounce the node > (restart mapreduce and dfs) before Hadoop can use the new disk? > > Thanks > > -Pete > > -- Have a Nice Day! Lohit
