Hi, At Boost.Geometry we're using CircleCI for testing. They allow to run the tests concurently on N virtual machines. I'd like to alter my script to automatically redistribute the tests evenly across all of the machines, i.e. to run 1/N of the tests on each machine. The problem is that at Boost.Geometry we have a lot of nested project directories, i.e. b2 executed for some upper directory runs the tests in the test-suite in this directory and then follows nested projects defined by build-project directives, so runs the tests recursively. So e.g. if b2 was executed on some virtual machine for the most-top-level directory all of the tests would be built anyway. Do you have an idea how this could be solved without altering the tests structure? Is it currently somehow possible (though AFAIK it isn't) or would be possible to implement options allowing to e.g.: - run b2 only for a certain directory/Jamfile, e.g. --non-recursive - ignore arbitrary Jamfile directive, e.g. --ignore-build-project - run only 1 per N tests, an option used together with -jX but running tests only for one thread, e.g. b2 -i2 -j4 running only 1 per 4 commands starting from 2nd command ? The last option would be the most convenient for me. The tests would be divided as evenly as possible. It wouldn't require to use some workarounds i.e. traversing test directories recursively and running b2 manually for them which could result in low-quality redistribution, e.g. if some directory contained many tests and other small number of tests. Regards, Adam