Using
kdump
●
Starting
kdump
- Log on to the desired node and use the following command to start the
kdump
utility:
$
service kdump start
●
Stopping
kdump
- Log on to the desired node and use the following command to stop the
kdump
utility:
$
service kdump stop
●
Checking the status of
kdump
- Log on to the desired node and use the following command to check the
status of the
kdump
utility:
$
service kdump status
For more information, see the
kdump(8)
and
crash(8)
man pages.
3.7
Cray Lightweight Log Management (LLM) System
The Cray Lightweight Log Management (LLM) system is the log infrastructure for Cray systems and must be
enabled for systems to successfully log events. At a high level, a library is used to deliver messages to
rsyslog
utilizing the RFC 5424 protocol;
rsyslog
transports those messages to the SMW and places the messages into
log files.
By default, LLM has a log trimming mechanism enabled called
xttrim
.
3.8
Urika-GX Node Power Management
A number of CLI scripts can be used to control node power. In addition, CLI scripts and the Nagios UI can be
used to monitor node status on the Urika-GX system.
The command described in this section all need to be executed on the SMW as root.
Start Up a Single Node
Use the
ux-nid-power-on
command to start up a node. For example, use the following command to start up
node 47:
$
ux-nid-power-on 47
Start Up All Nodes
Use the
ux-nid-power-on
script to start up all the nodes at once. For more information, see the
ux-nid-
power-on
man page
#
ux-nid-power-on
Stop a Single Node
Ensure that the analytics services are stopped on the node and Lustre is unmounted. Use the
ux-nid-power-
off
command to stop a running node. For example, use the following command to stop node 47:
System Management
S3016
45
