I am using a Geth client with three GPU for mining, one ethminer per GPU connected through rpc. I would like to be informed when a new DAG period comes, because:

- GPU number 1 and number 2 should switch off manually.

- Restarting ethminer on GPU 0 allows me to generate the new dag.

- I can restart mining on all GPU.



How do you handle this transition? How you get notified?





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