Renaming all nodes in Hadoop cluster

[Stuart White]

Is it possible to rename all nodes in a Hadoop cluster and not lose
the data stored on hdfs?  Of course I'll need to update the "master"
and "slaves" files, but I'm not familiar with how hdfs tracks where it
has written all the splits of the files.  Is it possible to retain the
data written to hdfs when renaming all nodes in the cluster, and if
so, what additional configuration changes, if any, are required?