Andy [genanr@xxxxxxxxxxxx] wrote: > I would like to increase the performance of the multibus mode of multipath. > It would be nice if multibus performance would be very close to accessing > the device directly. From what I have been told, under multibus, I/O's are > broken up into bio's and sent down the multiple paths, with no merging of > adjacent I/O's. Not quite correct. It depends on the path selector algorithm you use. "round_robin" with rr_min_io set to 1 will definitely give you bad performance for sequential I/O. If you set rr_min_io to a big number, the adjacent I/Os may be merged together. What values did you use in your testing? --Malahal. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
