Messages in this thread | | | Date | Fri, 25 Sep 2009 11:04:31 -0400 | From | Rik van Riel <> | Subject | Re: IO scheduler based IO controller V10 |
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Ryo Tsuruta wrote:
> Because dm-ioband provides faireness in terms of how many IO requests > are issued or how many bytes are transferred, so this behaviour is to > be expected. Do you think fairness in terms of IO requests and size is > not fair?
When there are two workloads competing for the same resources, I would expect each of the workloads to run at about 50% of the speed at which it would run on an uncontended system.
Having one of the workloads run at 95% of the uncontended speed and the other workload at 5% is "not fair" (to put it diplomatically).
-- All rights reversed.
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