What options do I have for reliably migrating data from one (small) HDFS cluster to another completely separate installation?
I have a network connection between clusters (this question is not a duplicate)
You can do this using distcp command which is available in Hadoop.
Check the below link to know about more
DistCp
Example
hadoop distcp hdfs://nn1:8020/foo/a hdfs://nn1:8020/foo/b
You can do this using distcp command which is available in Hadoop.
Check the below link to know about more
DistCp
Example