can i set "rotate via shortcut to a non integer number, for example 0.5?
You want to rotate pools every 30 seconds? That's not enough time for the dynamic difficulty to kick in.
To answer your question though, most likely, no.
--rotate Change multipool strategy from failover to regularly rotate at N minutes (default: 0)
yes i need 30 sec, 1 min is too much between workers, i'm using it to split the hash between multiple workers
i think it could be easily changed in the source, by putting seconds instead of minutes
I prefer --balance to split the hash between multiple workers, so each worker get the same hashrate
Or use --load-balance with the --quota value, to set x % hashrate for each worker.