[pnfs] stripe unit and server wsize/rsize

[Dean Hildebrand]

Maybe it is time to issue the layoutget at open time.  The policy 
interface has an option to support this (we just don't have code to 
support it :) )
Dean

Marc Eshel wrote:
> I noticed a problem when the rsize that is set at mount time is bigger 
> that the stripe unit. The read size that is used on the first read (before 
> getting the layout) is based on the rsize set at mount time and the code 
> is not able to do IO that spans more than one DS. We can either fix the 
> client code to break the read to multiple DSs or make sure that the server 
> limits wsize/rsize to the max stripe unit.
> Marc. 
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-- 
Dean Hildebrand
Ph.D. Candidate
University of Michigan