Can we assign multiple nodes to a yarn node label? What are the precautions need to take while assigning nodes to node labels?

[#1]

@Ram D

Yes based on this http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-...

Assign Node Labels to Cluster Nodes

Use the following command format to add or replace node label assignments on cluster nodes:

yarn rmadmin -replaceLabelsOnNode "<node1>:<port>=<label1> <node2>:<port>=<label2>"

For example, the following commands assign node label "x" to "node-1.example.com", and node label "y" to "node-2.example.com".

sudo su yarn
yarn rmadmin -replaceLabelsOnNode "node-1.example.com=x node-2.example.com=y"

[#2]

I am asking multiple nodes to a single node label.

[#3]

@Ram D yes see my comment above

[#4]

yes you can assign multiple nodes to a label, that's the premise of node labels, you want to designate GPU heavy nodes to node label GPU, nodes with SSD to label SSD, etc, the label needs to be shared and not exclusive. Here's design PDF and yet another PDF for node lables and associated Jira.

Here's a screenshot from the first PDF:

[#5 · Accepted solution]

I assigned multiple nodes to a node label. I configured the node labels accessible to specific queues sothat jobs submitted in a specific queue will run in the assigned nodes of a node label.

[#6]

@Ram D Something like this? https://community.hortonworks.com/content/kbentry/11434/yarn-node-labels-1.html