HP XC System Software Administration Guide Version 2.1

Contents
About This Document
1 HP XC Administrative Environment
1.1
Understanding Nodes, Roles, and Services ......................................... 1-1
1.2
Administrator Passwords ............................................................. 1-2
1.3
Secure Shell (ssh) ..................................................................... 1-3
1.4
Understanding the HP XC Command Environment ............................... 1-3
1.4.1
The HP XC Command Set ...................................................... 1-3
1.4.2
Interpreting the nodelist Parameter ............................................. 1-5
1.4.3
Executing a Command on Multiple Nodes .................................... 1-5
1.4.3.1
Using the pdsh Shell ....................................................... 1-5
1.4.3.2
Using the cexec Command ................................................ 1-6
1.5
Understanding the Configuration and Management Database .................... 1-7
1.6
Networking ............................................................................ 1-8
1.6.1
Linux Virtual Server (LVS) for HP XC System Alias ........................ 1-8
1.6.2
Network Time Protocol ......................................................... 1-8
1.6.3
Network Address Translation ................................................... 1-9
1.6.4
Network Information Service ................................................... 1-9
1.7
Local Storage .......................................................................... 1-9
1.8
Understanding and Maintaining the File System ................................... 1-9
1.8.1
General File System Layout .................................................... 1-10
1.8.2
HP XC File System Layout ..................................................... 1-11
1.8.3
HP XC Service Configuration Files ............................................ 1-11
1.8.4
Systemwide Directory ........................................................... 1-12
1.9
Log Files ............................................................................... 1-12
1.10
Managing Modulefiles ............................................................... 1-12
1.11
Software Distribution ................................................................. 1-13
1.12
Recommended Administrative Tasks ............................................... 1-13
2 Starting Up and Shutting Down the HP XC System
2.1
Starting Up the HP XC System ...................................................... 2-1
2.2
Shutting Dow
n the HP XC System ..................................................
2-1
2.3
Shutting Down One or More Nodes ................................................. 2-2
2.4
Managing N
ode Power ...............................................................
2-2
2.4.1
Determining a Node’s Power Status ........................................... 2-2
2.4.2
Turning No
de Power On ........................................................
2-3
2.4.3
Turning Node Power Off ........................................................ 2-3
2.4.4
Cycling N
ode Power ............................................................
2-3
2.4.5
Locating a Given Node .......................................................... 2-3
2.5
Disabli
ng and Enabling a Node ......................................................
2-4
3 Managing System Services
3.1
HP XC System Services .............................................................. 3-1
3.2
Displaying Services Information .................................................... 3-3
3.2.1
Displaying All Services ......................................................... 3-3
3.2.2
Displaying the Nodes That Provide a Specified Service ..................... 3-4
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ontents iii