08-10-2018 09:00 AM - last edited on 08-10-2018 10:21 AM by cjervis
I had a CDH 5.4.4 Cluster with 1 cloudera manager, 2 name nodes and 7 data nodes.
The cloudera manager and 2 name nodes are dead and lost (no backup).
The 7 data nodes are intact.
Is there a procedure to recover/remount the HDFS and HBase from the existing data nodes by building a new cluster with new name nodes and joining the existing data nodes with their existing data?
08-24-2018 11:15 PM
If you don't have any fsimage stored somewhere, there is no way to recover as the NameNodes maintain the metadata necessary that tells what files the blocks belong to.
If you have no fsimage backups and all the NameNodes are dead, the blocks are useless.
Hopefully you have a way of ingesting the data again.