You should stop the other miner first. It does make sense that two mining instances for one miner are possible. For example if you configure the software to only use specific GPUs.
So you can be able to mine on one pool with GPU0+1 and the other pool with GPU2+3 for example (I did not test it, but from what I read this is possible).
In my case each rig contains same GPU's. So all i want to select all my 300 hosts, rightclick, choose "Change pool" - that's it. If desired pool have same algo with current working miner - it's just change the pool, if not - closing working miner, starting needed...On each host...
If it sgminer - seems like it works, but if you using Claymore software - it's not.
Hi,
On sgminer and similar, the Change Pool feature can be performed with the API, and no restart is needed.
With Claymore miner, the mining process should be terminated and a new one should startup. In your case it sound like the first process doesn't terminate correctly. Could you please send me your Awesome Miner log file for this scenario and let me know the time when you performed the Change Pool operation? The log file can be found in toolbar: Tools->Log File
About your previous question on profit switching. When running sgminer and similar, you simply enable Awesome Profit Switcher in the Options dialog, Rules. It will look at all the pools that are available for the miner and prioritize in profit order.
Again, with Claymore miner it's much more complicated because there are two different miners depending on algorithm (Zcash vs Ethereum). In this case you need to use the "Multi Engine Profit Switcher" in the Options dialog. Then you need to add two Managed Miners. One with Claymore's Zcash and one with Claymore's Ethereum. Then you start one of them and the profit switcher will automatically switch to the other one (stop the first Managed Miner and start the second).
The scenario with multiple mining software and profit switching between them is a bit complex at the moment. I planning to write a guide on the web site on that topic.