question Re: How to change Namenode to a different host without losing data? in Archives of Support Questions (Read Only)

How to change Namenode to a different host without losing data?

sree_kuppa — Fri, 22 Sep 2017 23:29:00 GMT

I have a 5 node cluster (machines 01-05) with 4 data nodes (02, 03, 04, 05) which is running good. Now I want to upgrade the cluster from 5 nodes to 12 nodes by adding machines (06-12). Now I want to set 06 and 07 and name node and secondary name nodes instead of 01 (which is currently the name node). Can I do this without losing any data on the cluster? What is the best possible way to do this?

Re: How to change Namenode to a different host without losing data?

ssahi — Sat, 23 Sep 2017 01:08:09 GMT

Hi @Sree Kupp

There is a great write up here on this topic: https://community.hortonworks.com/articles/65837/migrate-namenode-from-one-machine-to-another-via-a.html

Ensure you adequately test this in a non-production environment.

Re: How to change Namenode to a different host without losing data?

sree_kuppa — Sat, 23 Sep 2017 07:32:18 GMT

Thanks Sonu, that helped 🙂