There is a Rosetta-specific preference that can only be configured via the website. It is called "Target CPU run time".
Previous values:
Default 8hrs
Minimum 1 hour
Maximum 24 hrs
New values:
Default 16hrs
Minimum 2 hours
Maximum 36 hrs
Work units will now be created with a 3 day
delay_bound. This means that tasks will only be issued to machines that estimate they can complete the task in less than 3 days. It also means that if the task is not returned within 3 days, it will be reissued (and BOINC Manager will abort it on your machine).
The Project Team prefers that you leave the runtime preference set to "not selected". This allows them flexibility to make changes in the future.
These longer runtimes will help the project better run the new COVID work units, and support the fantastic support for the user community.
What this means for your machine:
If you've never set a runtime preference, your work units will now target 16 hours of CPU time (which often takes 17 or 18 hours of actual time). Current actual runtime and raw CPU time can been seen in the workunit properties in the BOINC Manager.
Until BOINC Manager gets used to the new runtimes, it will mis-estimate remaining time to run. But it will learn after processing a few. It will also mean that BOINC Manager will request too much work, because it doesn't really understand how long it will take to complete.
This may result in Rosetta "taking over" your machine. Don't panic. If you can, just let things run normally and BOINC Manager will make the necessary adjustments to get back in balance with your resource share with other projects.
If you were running with a 6 day cache of work that only comes from R@h, this will now take a total of 12 days to complete. If this is the case for you, go ahead and abort a few of the tasks. Watch the due dates, many work units now will have 3 day expirations. This tends to mean that if you run R@h in a mix of other projects, that the Rosetta work units may grab "high priority". This is just the BOINC Manager working to complete the work before the due date. It will balance things out once it has a chance to see how these tasks run.
I should point out that my comments here are NOT the formal project announcement about the v4.12 release. I am making some assumptions from user reports and observation of WUs. Please post questions and comments to this thread.