For details on OPX Provider environment variables, refer to the official documentation in the Libfabric Programmer's Manual, fi_opx(7).

If BTS is enabled, you can elect to use it with FI_OPX_HFISVC=1. For OPX Software 12.1.1 and later releases, BTS is not enabled by default.

As of OPX Software 12.4 release, users no longer need to enable OPX context sharing manually. Context sharing is enabled by default. Refer to the OPX Provider man pages for detail on OPX context sharing.