On Mon, 11 Apr 2016 09:25:35 -0400 (EDT) Jason Dillaman wrote:

> In general, RBD "fancy" striping can help under certain workloads where
> small IO would normally be hitting the same object (e.g. small
> sequential IO). 
> 

While the above is very true (especially for single/few clients), I never
bothered to deploy fancy striping because you have to plan it very
carefully, as you can't change it later on.

For example if you start with 8 OSDs and set your striping accordingly (as
Alwin's example suggested) but later add more OSDs you won't be taking
full advantage of the IOPS availalbe.

Christian
-- 
Christian Balzer        Network/Systems Engineer                
ch...@gol.com           Global OnLine Japan/Rakuten Communications
http://www.gol.com/
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