https://community.cloudera.com/t5/Archives-of-Support-Questions/Prune-namenode-metadata/m-p/162915#M24803 <P>Use <A href="https://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-hdfs/HDFSCommands.html#fsck">fsck,</A> it's a tool of choice to manage HDFS. "Orphans" are corrupted files (with missing blocks) in HDFS lingo. You can use "-move" or "-delete" options to move corrupted files to /lost+found or to delete them. fsck will also tell you about under-replicated blocks (having at least 1 replica but less than configured replication factor) but HDFS will repair them little by little by creating missing replicas.</P> Sat, 09 Apr 2016 07:56:09 GMT pminovic 2016-04-09T07:56:09Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Prune-namenode-metadata/m-p/162914#M24802 <P>I am interested in pruning entries manually from the name node. If orphan entries exist in namenode (where namenode thinks file exist when it does not) how do I manually remove from namenode metadatea?</P> Sat, 09 Apr 2016 04:53:47 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Prune-namenode-metadata/m-p/162914#M24802 sunile_manjee 2016-04-09T04:53:47Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Prune-namenode-metadata/m-p/162915#M24803 <P>Use <A href="https://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-hdfs/HDFSCommands.html#fsck">fsck,</A> it's a tool of choice to manage HDFS. "Orphans" are corrupted files (with missing blocks) in HDFS lingo. You can use "-move" or "-delete" options to move corrupted files to /lost+found or to delete them. fsck will also tell you about under-replicated blocks (having at least 1 replica but less than configured replication factor) but HDFS will repair them little by little by creating missing replicas.</P> Sat, 09 Apr 2016 07:56:09 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Prune-namenode-metadata/m-p/162915#M24803 pminovic 2016-04-09T07:56:09Z