Questions on Nemotron Nano Omni - including async GRPO, multi-node RDMA, R3, and fully async training

[JihwanEom]

Hi, I have a few questions regarding Nemotron Nano Omni and would like to raise them as an issue.

1. Are there any plans to support async GRPO for Nano-Omni (including non-colocated setups and in-flight weight updates)?
2. Related to (1): when I tried async GRPO with Nemo-RL on my own in a non-colocated setting, cross-node communication of pixel_values was extremely heavy. Since Ray does not yet seem to support IB RDMA, I ran into significant difficulties scaling to multi-node. Have you encountered the same issue, and are there any plans to address it?
3. My understanding is that R3 (Routing Replay; https://arxiv.org/abs/2510.11370), which is supported in Verl and slime, has not yet been implemented in Nemo-RL. Are there plans to support it?
4. Are there plans to support fully async training, including partial rollouts?

Thanks in advance!