Download here - Mellanox

1.5.2-2.1.0-1.1.1000
OpenSM – Subnet Manager
7
OpenSM – Subnet Manager
7.1
Overview
OpenSM is an InfiniBand compliant Subnet Manager (SM). It is provided as a fixed flow executable called opensm, accompanied by a testing application called osmtest. OpenSM implements an
InfiniBand compliant SM according to the InfiniBand Architecture Specification chapters: Management Model (13), Subnet Management (14), and Subnet Administration (15).
7.2
opensm Description
opensm is an InfiniBand compliant Subnet Manager and Subnet Administrator that runs on top of
the Mellanox OFED stack. opensm performs the InfiniBand specification’s required tasks for initializing InfiniBand hardware. One SM must be running for each InfiniBand subnet.
opensm also provides an experimental version of a performance manager.
opensm defaults were designed to meet the common case usage on clusters with up to a few hundred nodes. Thus, in this default mode, opensm will scan the IB fabric, initialize it, and sweep
occasionally for changes.
opensm attaches to a specific IB port on the local machine and configures only the fabric connected to it. (If the local machine has other IB ports, opensm will ignore the fabrics connected to
those other ports). If no port is specified, opensm will select the first “best” available port. opensm
can also present the available ports and prompt for a port number to attach to.
By default, the opensm run is logged to two files: /var/log/messages and /var/log/
opensm.log. The first file will register only general major events, whereas the second file
will include details of reported errors. All errors reported in this second file should be treated as
indicators of IB fabric health issues. (Note that when a fatal and non-recoverable error occurs,
opensm will exit.) Both log files should include the message "SUBNET UP" if opensm was able
to setup the subnet correctly.
7.2.1 opensm Syntax
opensm [OPTIONS]
where OPTIONS are:
--version
Prints OpenSM version and exits.
--config, -F <file-name>
The name of the OpenSM config file. When not specified
/etc/opensm/opensm.conf will be used (if exists).
--create-config, -c <file-name>
106
Mellanox Technologies
Mellanox Technologies Confidential