HP XC System Software Administration Guide Version 3.2

1 Nodes assigned service roles
0 Exclusive servers
1 Non-exclusive servers
3 Compute nodes
Role HN HN Ext Ext Exc
Recommend Assigned Rec Req Rec Req Rec Rec Role
----------------------------------------------------------------
3 3 compute
1 1 disk_io
1 1 external (optional)
1 0 login (optional)
1 1 management_hub
1 1 management_server
1 0 nis_server (optional)
1 1 resource_management
The column headings in the middle of the report correspond to parameters in the service.ini
file as follows:
head_node_requiredHN Req
head_node_desiredHN Rec
external_connection_requiredExt Req
external_connection_desiredExt Rec
exclusivity_desiredExc Rec
An N in these columns indicates a note; a W indicates a warning. When notes and warnings are
present, more detailed descriptions are displayed immediately after the table.
All services requesting exclusive servers (exclusivity_desired=1) and specifying the same
exclusivity group (exclusivity_group=group1, for instance) are grouped together on the
same exclusive group of server nodes during the default initial configuration and configuration
analysis if the HP XC system is of sufficient size. These hints are ignored on small HP XC systems.
4.6.10 Adding a New Service
The first step in adding a service is to decide whether you need to add the service to an existing
role or if you need to create a new role and add the new service to it. This section describes both
procedures.
• “Adding a Service to an Existing Role”
• “Creating a New Role and Adding a Service to It”
4.6.10.1 Adding a Service to an Existing Role
Add a service to an existing role only when you have exclusive use of the HP XC system when
no jobs are running because the procedure requires that you reimage nodes.
Before you begin, write the required configuration scripts (gconfig, sconfig, nconfig, or
cconfig) for your service.
Follow this procedure to add a service to an existing role. This procedure adds a service called
newservice to the common role.
1. Log in as the superuser on the head node.
2. Make a copy of the roles_services.ini file for safekeeping:
# cd /opt/hptc/config
# cp role_services.ini role_services.ini.ORIG
3. Determine the role that best suits the new service.
76 Managing and Customizing System Services