Now that we have better path selectors than round-robin, is seems kind of silly to have all of our built-in device configs actually setting their path selector to round-robin. I think we should either change the default, or not set a path selector in the builtin device configs, unless the harware vendor thinks that one of them will give the best performace. Personally I'd be in favor of doing both. Removing them from the builtin device configs, and changing the default to either queue-length or service-time. Also, since we are now increasing dev_loss_tmo to make sure that devices don't get removed before queue_if_no_path times out, it seems reasonable to set a default value for fast_io_fail_tmo, so that devices which will queue forever will actually fail back the IO in a reasonable time, something like 5. These would go a long way towards make the defaults work better on more systems. Any thoughts? -Ben -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
