You can send computations to the oldest or youngest node. The following code snippet sends computations to the oldest and youngest nodes:

package com.packt;
import org.apache.ignite.Ignite;
import org.apache.ignite.IgniteCluster;
import org.apache.ignite.IgniteCompute;
import org.apache.ignite.Ignition;
import org.apache.ignite.cluster.ClusterGroup;
import org.apache.ignite.configuration.IgniteConfiguration;

public class OldestAndNewest {
 public static void main(String[] args) {
     IgniteConfiguration cfg = new IgniteConfiguration();
     cfg.setPeerClassLoadingEnabled(true);
     try (Ignite ignite = Ignition.start(cfg)) {
         IgniteCluster cluster = ignite.cluster();
 
         //Get the oldest node
         ClusterGroup forOldest = cluster.forOldest();
 
         //Get a compute task for the oldest servers
         IgniteCompute compute = ignite.compute(forOldest);
 
         //broadcast the computation to the oldest node
         compute.broadcast(() -> {
             System.out.println("**************
Old is Gold!!!
*******************");
         });
 
 
         //Get the youngest node
         ClusterGroup forYoungest = cluster.forYoungest();
 
         //Get a compute task for the youngest node
         compute = ignite.compute(forYoungest);
 
         //broadcast the computation to the youngest node
         compute.broadcast(() -> {
             System.out.println("************
Young blood!!!
*************");
         });
     }
  }
}

The oldest ignite instance will print the text Old is gold. Verify that the other server instance didn't print anything:

As the program itself is the youngest server node, it will print Young blood: