HP XC System Software Installation Guide Version 3.1

Roles to be assigned: compute disk_io login
[R]eassign Roles, [O]k, [C]ancel :
5. Do one of the following:
• Enter the letter o to accept the role assignments you just made to the node.
• Enter the letter r to start the role assignment process again on this node. The Reassign Roles
option does not apply the role assignments, it simply allows you to return to the list of roles and
make adjustments to the role assignments.
• Enter the letter c to cancel the operation and make no changes to the currently assigned roles
on this node
G.6 Analyze Current Role Assignments Against HP Recommendations
From the command-line menu of the cluster_config utility, enter the letter a to analyze current node
role assignments recommended by HP, which are optimized for scale-out.
[L]ist Nodes, [M]odify Nodes, [A]nalyze, [H]elp, [P]roceed, [Q]uit: a
HP recommends using this option any time you run the cluster_config utility, even when you are
configuring the system for the first time.
First Portion of Command Output
The first portion of the command output provides the general recommendations for dividing the system
into service servers and compute nodes based on the total number of nodes (in this example, the
recommendations are for a 500-node system). Table G-2 provides a detailed explanation of the output.
Recommended Cluster Configuration Total Nodes: 500
----------------------------------------------------------------
9 Nodes assigned service roles
1 Exclusive servers
1 resource_management(slurm)
8 Non-exclusive servers
491 Compute nodes
Table G-2 General Command Output of the Analyze Option
DescriptionItem
Shows the actual total number of nodes in the system.Total nodes
Shows the recommended number of nodes to be assigned any role except the
compute role.
Nodes assigned service roles
Shows the recommended number of nodes to be dedicated to a role.Exclusive servers
Shows the recommended number of nodes to have roles assigned other than the
compute role minus the number of exclusive servers.
Non-exclusive servers
Shows the recommended number of dedicated compute nodes.Compute nodes
Second Portion of Command Output
The second portion of the command output provides information about specific role assignment
recommendations. This output does not identify specific node names. To determine specific node names,
use the List function. Table G-3 provides an explanation of the output.
Role HN HN Ext Ext Exc
Recommend Assigned Rec Req Rec Req Rec Rec Role
----------------------------------------------------------------
491 491 compute
1 1 disk_io
8 1 external (optional)
1 0 login (optional)
8 8 management_hub
1 1 management_server
16 0 nis_server (optional)
146 Using the cluster_config Command-Line Menu