[pnfs] 19 questions

[Marc Eshel]

pnfs-bounces at linux-nfs.org wrote on 02/06/2008 11:29:50 AM:

> On Wed, Feb 06, 2008 at 11:27:05AM -0800, Dean Hildebrand wrote:
> > Hmmm, the problem I see is that there could be multiple exported file 
> > systems supporting the same layout type.  So matching the exported 
> > layout type to the getdeviceinfo layout type isn't sufficient.  You 
> > would have to call export_op->getdeviceinfo on each exported file 
system 
> > that matches the layout type until you find one that recognizes the 
> > deviceid.  ugh.
> > 
> > So I think that we still need to somehow encapsulate which export we 
are 
> > referring to in the deviceid.  But if fsid's can be up to 24 bytes 
long, 
> > we have a problem.
> 
> Ignorant question from someone who hasn't looked at the protocol in a
> while, but: do deviceid's have to remain the same after reboot of the
> metadata server, or can they be constructed in memory and then forgotten
> on reboot?
> 

They must remain the same.

> --b.
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