HP XC System Software Release Notes for Version 3.0

13 Interconnect Notes
This chapter contains information that applies to the supported interconnect types:
• InfiniBand Interconnect (page 61)
• Myrinet Interconnect (page 61)
• QsNetII Interconnect (page 61)
13.1 InfiniBand Interconnect
At the time of publication, no release notes are specific to the InfiniBand® interconnect.
13.2 Myrinet Interconnect
The following release notes are specific to the Myrinet® interconnect.
13.2.1 The clear_counters Command Does Not Work on the 256 Port Switch
The /opt/gm/sbin/clear_counters command does not clear the counters on the Myrinet
256 port switch. The web interface to the Myrinet 256 port switch has changed from the earlier,
smaller switches.
To clear the switch counters, you must open an interactive Web connection to the switch and
clear the counters using the menu commands. The gm_prodmode_mon script, which uses the
clear_counters command, will not clear the counters periodically, as it does on the smaller
switches.
This problem will be resolved in a future software update from Myricom.
13.3 QsNet
II
Interconnect
The following release notes are specific to the QsNet
II
® interconnect.
13.3.1 Cannot Use telnet With Quadrics Switch Controller Firmware Version
44-5032399
Due to a known firmware bug, you cannot use the telnet command to access the Quadrics
switch controller if the switch controller is running firmware version 44-5032399.
However, you can log in to the switch controller using ssh if you enable ssh access and disable
telnet access on the switch controller.
Refer to Appendix D in the HP XC System Software Installation Guide for instructions on how to
configure the telnet and ssh access settings.
13.3.2 ELAN4 Diagnostic Tools Fail on Systems With ELAN3 Interconnect
This release note applies only to systems with an ELAN3 interconnect.
The /opt/hptc/etc/gconfig.d/C30swmlogger gconfigure script, which is run by the
cluster_config utility, fails on an ELAN3 system because the swmlogger service and the
qsnet diagnostic database are supported only on ELAN4 systems.
On ELAN3 systems, enter the following commands on the head node to stop the swmlogger
service from running and to disable the swmlogger service from starting at boot time. You must
run these two commands any time you rerun the cluster_config utility:
# service swm stop
# chkconfig --del swm
13.1 InfiniBand Interconnect 61