question Re: How to troubleshoot slow NameNode start up? in Support Questions

question Re: How to troubleshoot slow NameNode start up? in Support Questions https://community.cloudera.com/t5/Support-Questions/How-to-troubleshoot-slow-NameNode-start-up/m-p/281606#M209476 <a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/52124">@Elephanta</a>  Okay, now with that information I get a better understanding and picture. By default, HDP 2.6 has a replication factor of 3  so it's looking to place the other 2 copies on different data nodes that the existing unless you create new files with a replication factor of 1 you will continue to get the unreplicated block errors 🙂 but now that you know it's manageable.Maybe next time you delete files in hdfs use the -skipTrash optionhdfs dfs -rm -skipTrash /path/to/hdfs/file/to/remove/permanentlyor emtpyting the existing .TrashOptions:Change the replication factor of a file  at creatio:hdfs dfs –setrep –w 1  /user/hdfs/file.txt Or  change the replication factor of a directory hdfs dfs -setrep -R 1  /user/hdfs/your_dir Changing the replication factor for a directory will only affect the existing files and the new files under the directory will get created with the default replication factor  in dfs.replication from hdfs-site.xml  maybe in your case this is what you should change to 1 as this takes effect cluster-wide for your Dev environment Happy hadooping     Wed, 30 Oct 2019 05:19:35 GMT Shelton 2019-10-30T05:19:35Z