Transport selection¶
oneCCL supports two transports for inter-node communication: Intel® MPI Library and Libfabric*.
The transport selection is controlled by CCL_ATL_TRANSPORT.
In case of MPI over Libfabric implementation (for example, Intel® MPI Library 2019) or in case of direct Libfabric transport,
the selection of specific Libfabric provider is controlled by the FI_PROVIDER environment variable.