https://community.cloudera.com/t5/Archives-of-Support-Questions/Delete-old-BP-DataNode-directories-by-hand/m-p/219593#M69602 <P><A rel="user" href="https://community.cloudera.com/users/2663/jasonbreitweg.html" nodeid="2663">@Dr. Jason Breitweg</A>, it will not be deleted automatically.</P><P>There may be block files under that directory that you need. If the cluster has any important data - I'd recommend running '<EM>hdfs fsck</EM>' to ensure there are no missing/corrupt blocks before you delete <EM>/var/hadoop/hdfs/data/current/BP-*</EM>.</P><P>Even then I'd first move the directory to a different location, restart DataNodes and rerun fsck to ensure you don't cause data loss.</P> Sat, 14 Oct 2017 05:30:15 GMT ArpitAgarwal 2017-10-14T05:30:15Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Delete-old-BP-DataNode-directories-by-hand/m-p/219592#M69601 <P>By mistake /var/hadoop/hdfs/data was in my list of DataNode directories. I have removed this in Ambari and restarted all services successfully. I was under the impression that /var/hadoop/hdfs/data/current/BP-* would then be deleted but it is still there and taking up space. Is it safe to delete it by hand? </P> Fri, 13 Oct 2017 15:36:50 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Delete-old-BP-DataNode-directories-by-hand/m-p/219592#M69601 jason_breitweg 2017-10-13T15:36:50Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Delete-old-BP-DataNode-directories-by-hand/m-p/219593#M69602 <P><A rel="user" href="https://community.cloudera.com/users/2663/jasonbreitweg.html" nodeid="2663">@Dr. Jason Breitweg</A>, it will not be deleted automatically.</P><P>There may be block files under that directory that you need. If the cluster has any important data - I'd recommend running '<EM>hdfs fsck</EM>' to ensure there are no missing/corrupt blocks before you delete <EM>/var/hadoop/hdfs/data/current/BP-*</EM>.</P><P>Even then I'd first move the directory to a different location, restart DataNodes and rerun fsck to ensure you don't cause data loss.</P> Sat, 14 Oct 2017 05:30:15 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Delete-old-BP-DataNode-directories-by-hand/m-p/219593#M69602 ArpitAgarwal 2017-10-14T05:30:15Z