[Lustre-discuss] Lustre client & server on the same node, NFSv4 reexport

Lukas Hejtmanek xhejtman at ics.muni.cz
Fri Aug 19 06:37:42 PDT 2011


On Thu, Aug 18, 2011 at 11:50:55AM -0400, Oleg Drokin wrote:
> > some time ago, I was asking whether it is possible to use Lustre Client and
> > Server on a single node, i.e., if I can mount Lustre FS on an OSD node. The
> > anwser was NO as there were some issues with cache pressure and deadlocks. 
> This is still not recommended, but I doubt anybody made any serious tests with e.g. 2.x codebase.
> I suspect as long as you don't use mmap all should be fine in both 1.8 an 2.x

so what about mounting lustre fs on OSD nodes and re-exporting it via NFSv4?
I.e., can I use OSD nodes also as NFSv4 gateways? 

> > Another question, is NFSv4 re-export supported with current stable Lustre
> > client?
> Yes this should work, but posix locking does not work properly in 1.8 in that case.
> It does work with 2.1 clients.

Thank you for asnwers.

Lukáš Hejtmánek

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