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Hi, I’m working on 6.5 running with 2.6.32-431.el6.x86_64, my multipath.conf if configured with both rr_min_io and rr_min_io_rq, running 64k 100% write load to my storage system using 8 paths over FC (“queue-length” policy). I found [1] that rr_min_io is deprecated in favor of rr_min_io_rq, but playing with these values show that different rr_min_io_rq have no influence on performance in my env, however, different values of rr_min_io have huge influence on
the average latency I get for the same iops. Am I missing something? device-mapper-libs-1.02.79-8.el6.x86_64 device-mapper-event-libs-1.02.79-8.el6.x86_64 device-mapper-persistent-data-0.2.8-2.el6.x86_64 device-mapper-1.02.79-8.el6.x86_64 device-mapper-event-1.02.79-8.el6.x86_64 device-mapper-multipath-libs-0.4.9-72.el6_5.3.x86_64 device-mapper-multipath-0.4.9-72.el6_5.3.x86_64 |
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