I'm not certain of all of the things that will make it change, but I do know that in addition to changing the Pega system name, if you change the location of the temp directory or change the host name of the server, these actions will also cause the NodeID to change as well.
Posted: 6 years ago
Posted: 24 Nov 2016 0:23 EST
Rajiv Nistala (nistr)
Senior Manager - Engineering
Node ID is computed as a hash of the concatenated string of hostname, system name and temp directory path. Opening the instance of Data-Admin-Nodes for that node id should show the string being used for the hash. Alternatively, you can also get to it from the System Name landing page (Designer Studio -> System -> Settings -> System Name)