HP XC System Software Administration Guide Version 2.1

• LVS Director Service
The LVS Director is the node that controls the placement of the user logins on the LVS ring.
• Login
The login service is assigned to any node in the Linux Virtual Server (LVS) ring. LVS
assigns a user login to one of these nodes whenever that user requ ests a login to the system
through the system name or Internet Protocol (IP) address.
A login node requires a connection to the external network.
• I/O Service
An I/O node prov ides I/O s erv ices for the system.
The I/O nodes provide access to Storage Area Networks (SA Ns) connected to the node,
access to f ile systems that are mounted locally to the node, or both.
An I/O node should r eside in the Utility Cabinet and connect to the root Ethernet switch.
• Network Address Translation (NAT) server
The NAT server node provides external access to the nodes in the system that do not have
an external network connection.
The system may have multiple NAT servers configured to balance the access to the external
network.
• Management Hub Services
The node that provides managem ent hub services is a central po int for management
daemons, including those that provide system logs and performance information.
• LSF-HPC master server. L SF-HPC is an impl ementation of the Platform Load Sharing
Facility ( LSF) for HP XC.
The node that is assigned this service is responsible fo r running the LSF-HPC daemons.
• Image Server service
The golde n client m aintains an ima ge of the file system that is the mod el for all t he nodes in
the HP XC system, With the SystemI mager, you can update ev e ry node with system - wid e
information, such as, user account data.
_______________________ Note _______________________
The golden client and SystemImager are bound to the same node.
• Configuration database server
The node assigned this service is the MySQL Configuration Database server for this system .
See Section 1.5 for additional information on the configuration database.
• DHCP server
This service assigns IP addresses for all devices on the internal network based on the DHCP
Server node’s Machine Access Control (MAC) address.
• Power Daemon service
The power subsystem daemon enables you to turn on, turn off, cycle, and reset power on
individual nodes, and also report whether a no de’s power is on or off.
This daemo n is autom ati cally assigned to the head node.
See the HP XC System Overview for additional information on nodes and services.
1.2 Administrator Passwords
An administrator f or an HP XC system needs to assign a number of passwo rd s during
installation and use for system administrat ion. Each one of these passwords should be unique.
1-2 HP XC Administrative Environment