User guide

3–InfiniBand
®
Cluster Setup and Administration
Subnet Manager Configuration
IB0054606-02 A 3-11
OpenSM is a component of the OpenFabrics project that provides a Subnet
Manager (SM) for IB networks. This package can optionally be installed on any
machine, but only needs to be enabled on the machine in the cluster that will act
as a subnet manager. You cannot use OpenSM if any of your IB switches provide
a subnet manager, or if you are running a host-based SM, for example the QLogic
Fabric Manager.
If you are using the Installer tool, you can set the OpenSM default behavior at the
time of installation.
OpenSM only needs to be enabled on the node that acts as the subnet
manager.Toenable OpenSM the iba_config command can be used or the
chkconfig command (as a root user) can be used on the node where it will be
run. The chkconfig command to enable the OpenSM is:
chkconfig opensmd on
The chkconfig command to disable it on reboot is:
chkconfig opensmd off
You can start opensmd without rebooting your machine by typing:
/etc/init.d/opensmd start
You can stop opensmd by typing:
/etc/init.d/opensmd stop
If you want to pass any arguments to the OpenSM program, modify the following
file, and add the arguments to the
OPTIONS variable:
/etc/init.d/opensmd
For example:
Use the UPDN algorithm instead of the Min Hop algorithm.
OPTIONS="-R updn"
For more information on OpenSM, see the OpenSM man pages, or look on the
OpenFabrics web site.
!
WARNING
Don’t run OpenSM with QLogic FM in the same fabric.