[dm-devel] understanding of multipathing and speed

[brem belguebli]

Can't it  just be the max disk perf is reached during the second test,
adding extra paths won't be of any help or maybe could worsen the
expected perfs ....



2010/7/6 Christophe Varoqui <christophe.varoqui at gmail.com>:
>> routing points to the correct interface per network. Maybe my test
>> (bonnie++)
>>
>> is not an appropriate one to show the difference in speed?
>>
> an interesting data point would be a perf run when iet target has only one
> target port on a bonded interface a multipath on client side.
>
> And maybe the other combinations. Th eset combinations would be :
> - client bonded, target not bonded
> - client bonded, target bonded (i understand this is the scenario with good
> performance you reported earlier)
> - client not bonded, target not bonded (perf expected from a single path in
> your testing)
> - client not bonded, target bonded
>
> the mixed setup would not be adequate for production as they require linked
> or single switch setups, but the information might help determine if the
> performance drop is due to multipath or iet multi-target.
>
> Bye.
>
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