Re: rbd export speed limit

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On Wed, 13 Feb 2013, Stefan Priebe - Profihost AG wrote:
> Hi,
> Am 12.02.2013 21:45, schrieb Andrey Korolyov:
> > you may be interested in throttle(1) as a side solution with stdout
> > export option.
> What's throttle? Never seen this. Wouldn't it be possible to use tc?
> 
> > By the way, on which interconnect you have manage to
> > get such speeds,
> Bonded Intel 2x 10GBE
> 
> > if you mean 'commited' bytes(e.g. not almost empty
> > allocated image)?
> Yes commited images.

FWIW I'm pretty sure the rbd export is doing a single IO at a time 
(reading one chunk, 4MB by default).  Are there lots of them in parallel, 
or is a single export operation significantly affecting performance?  
That would be a bit surprising to me..

sage

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