So I learned that since Red Hat 6 it is possible to choose between 3 algorithms for loadbalancing between different paths to my FC-SAN, the default dumb round-robin - and new - queue-length and service-time.
I have been searching for a long time now for a performance-comparison for different values for path_selector in a multibus-configuration, but I was not able to find any information based on real experience. I did not even find an assumption of what performs better in which situations.
Does anyone have done some real performance-testing on this question? Or information about resources I was not able to find?