How to change Avamar Node Type

August 19, 2009

When running Avamar in a lab environment, I have come across situations where I want to use a node that was part of a previous Avamar configuration and make it a spare, single node server, a data node  or possibly even an accelerator node for another Avamar Data Store.

In the past I was not sure how to change the node type. 

Fortunately, I recently came across the command to make this happen.

As root, run change_nodetype in the /usr/local/avamar/src directory.

(Verify that you are logged in as root) whoami command

# /usr/local/avamar/src/change_nodetype –[type]

–[type] = the type of node to be configured.

The accepted types include:
data,axion-e (single node server),accelerator,spare,utility

As an example, in a recent situation, an Avamar storage node was mistakenly setup as an Avamar Accelerator node.  The desired setup was a RAIN configuration with a Utility Node, 4 1TB Storage Nodes and 1 Spare Node.  In our setup, we had the Utility Node, 3 1TB Storage nodes, 1 Spare node and the 1TB Accelerator Node that was configured improperly. 

To correct the issue, I performed the following tasks on the accelerator node to make it a data node:

Opened a Putty session to the Accelerator Node and logged in as root

typed the following command:

 /usr/local/avamar/src/change_nodetype –data

Afterwards, I had to update the usersettings.cfg file using vi or nano and confirm that the server name is correct by typing the following command:

nano /usr/local/avamar/etc/usersettings.cfg (as seen below):


***If you need to change the hostname or IP address as well, use the following command as root:

/usr/sbin/netconfig –ip=ipaddress –netmask=subnet mask hostname=hostname –domain=domain.name –device=eth0 –gateway=default gateway

You also want to make sure that the following configuration files are correct:



You may now reboot, once the node boots back up, log in from a Putty session and verify that the notification screen states the correct node type.

From here I was able to continue with the procedures to add an additional storage node…



  1. Interesting and informative. But will you write about this one more?

    • It took me awhile, but I finally was able to find time to write a little more on this.

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