public static void minibench(final int operations, final int threadsPerNode, final Set<Integer> benchmarks) {
final ConnectionFactory cf = ConnectionFactory.getInstance();
final List<PeerNode> nodes = cf.getNodes();
final int parallelRuns = nodes.size();
// set a connection policy that goes through the available nodes in a round-robin fashion:
cf.setConnectionPolicy(new RoundRobinConnectionPolicy(nodes));
System.out.println("Number of available nodes: " + nodes.size());
System.out.println("-> Using " + parallelRuns + " parallel instances per test run...");
long[][] results;
String[] columns;
String[] rows;