User Manual

OpenSM – Subnet ManagerRev 2.1-1.0.6
Mellanox Technologies
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--do_mesh_analysis
This option enables additional analysis for the lash
routing engine to precondition switch port assignments
in regular cartesian meshes which may reduce the number
of SLs required to give a deadlock free routing
--lash_start_vl <vl number>
Sets the starting VL to use for the lash routing algorithm.
Defaults to 0.
--sm_sl <sl number>
Sets the SL to use to communicate with the SM/SA. Defaults to 0.
--connect_roots, -z
This option enforces routing engines (up/down and
fat-tree) to make connectivity between root switches
and in this way be IBA compliant. In many cases,
this can violate "pure" deadlock free algorithm, so
use it carefully.
--ucast_cache, -A
This option enables unicast routing cache to prevent
routing recalculation (which is a heavy task in a
large cluster) when there was no topology change
detected during the heavy sweep, or when the topology
change does not require new routing calculation,
e.g. in case of host reboot.
This option becomes very handy when the cluster size
is thousands of nodes.
--lid_matrix_file, -M <file name>
This option specifies the name of the lid matrix dump file
from where switch lid matrices (min hops tables will be
loaded.
--lfts_file, -U <file name>
This option specifies the name of the LFTs file
from where switch forwarding tables will be loaded.
--sadb_file, -S <file name>
This option specifies the name of the SA DB dump file
from where SA database will be loaded.
--root_guid_file, -a <path to file>
Set the root nodes for the Up/Down or Fat-Tree routing
algorithm to the guids provided in the given file (one