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[dm-devel] Re: IO scheduler based IO controller V10



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).

--
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