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HP XC System Software Installation Guide Version 2.1

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You can improve the responsiveness on such systems by limiting the number of nodes that are
imaged simultaneously, which is accomplished by including the --max_at_once= option on
the startsys command line. The recommended values for the --max_at_once option are
shown in Table 4-4.
Table 4-4: Head Node Memory and Node Counts
Memory on the Head Node
Number of Nodes in the
System
Value of the max_at_once
Option
Less than 3 GB More than 32 nodes
32
Less than 8 GB More than 64 nodes
64
Follow this procedu re to start the system and propagate the golden image to all nodes:
1. Boot all nodes:
# startsys [--max_at_once=n]
Command output looks sim ilar to t he following:
Attempting to power on nodes: n[14-16]
Sending command to power on nodes.
Power on command sent, waiting for response.
Tue June 28 13:46:59 EDT 2005
Done: n16
Pending: n[14-15]
Tue June 28 13:47:14 EDT 2005
Done: n16
Pending: n[14-15]
Tue June 28 13:47:29 EDT 2005
Done: n16
Pending: n[14-15]
.
.
.
Tue June 28 13:54:27 EDT 2005
Done: n16
Pending: n[14-15]
Tue June 28 13:54:42 EDT 2005
Done: n16
Pending: n[14-15]
Tue June 28 13:55:21 EDT 2005
Done: n16
Pending: n[14-15]
Powered on nodes: n[14-16].
2. Run the S LURM post- configuration scr ipt:
# /opt/hptc/sbin/spconfig
Detected the Quadrics Elan interco
nnect; configuring SLURM
support...
The new ’elanhosts’ file contains en
tries for 10 nodes.
Restarting SLURM...
SLURM Post-Configuration Done.
_______________________ Note _______________________
The previous com man d was run on a system w ith an QsNet
II
interconnect.
You r output will vary depending upon the type of interconnect in use.
If your system is using a QsNet
II
interconnect, ensure that the number of
node entries in the /opt/hptc/libelanhosts/etc/elanhosts
file matches the expected number of operatio nal n odes in the cluster. If the
number does not match, verify the status of the nodes to ensure that they are
all up and running and rerun the spconfig script.
Configuring and Imaging the System 4-23