Developer Reference

Communication Fabrics Control

I_MPI_FABRICS

Select the particular fabrics to be used.
Syntax
I_MPI_FABRICS=ofi |
shm:ofi |
shm
Arguments
<fabric>
Define a network fabric.
shm
Shared memory transport (used for intra-node communication only).
ofi
OpenFabrics Interfaces* (OFI)-capable network fabrics, such as Intel® True Scale Fabric, Intel® Omni-Path Architecture, InfiniBand*, and Ethernet (through OFI API).
Description
Set this environment variable to select a specific fabric combination.
The default values are
shm:ofi
for the regular mode and
ofi
for the multiple endpoints mode. In the multiple endpoints mode, the default value
ofi
cannot be changed.
This option is not applicable to
slurm
and
pdsh
bootstrap servers.
DAPL
,
TMI
, and
OFA
fabrics are deprecated.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.