FedOpt for cross-silo

[kamelferrahi]

I would like to ask if Fedopt is only available in the simulation mode? Is there any way to use it in the cross-silo mode with MQTT as FedAvg.
Thanks

[fedml-dimitris]

Hello @kamelferrahi, have you tried using FedOpt:
https://github.com/FedML-AI/FedML/blob/master/python/examples/federate/cross_silo/mpi_fedavg_mnist_lr_example/config/fedml_config.yaml#L15

in a configuration file like the one below:
https://github.com/FedML-AI/FedML/blob/master/python/examples/federate/cross_silo/mqtt_s3_fedavg_mnist_lr_example/step_by_step/config/fedml_config.yaml

and it did not work?

[kamelferrahi]

Hi @fedml-dimitris , Yes using FedOpt like in :
https://github.com/FedML-AI/FedML/tree/master/python/examples/federate/prebuilt_jobs/fedgraphnn/moleculenet_graph_clf/config_fedopt/simulation_gcn
in the simulation mode using MPI backend works flawlessly
However using it in a crosss-silo environnement like in:
https://github.com/FedML-AI/FedML/blob/master/python/examples/federate/cross_silo/mqtt_s3_fedavg_mnist_lr_example/step_by_step/config/fedml_config.yaml
by replacing the FedAvg by FedOpt cause an Exception

Does FedOpt work only in the simulation mode?