Good Day, I am planning to switch from Apache hadoop2 hdfs to horotonworks.
Wanted to know the procedure to migrate data such as hdfs files, datanodes metadata, namenode metadata with minimal downtime.
I have the following setup with 4 data nodes, 2 name nodes HA, Zookeeper and QJM, HA resource manager.
Some sites mentioned to use Distcp but, I am not sure what to extract from older hdfs to the new one.
Also when setting up Hortonworks do you need Ambari with it?
Thanks & Regards,
Surinder