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

Oleg Drokin green at whamcloud.com
Thu Aug 18 08:50:55 PDT 2011


On Aug 18, 2011, at 6:47 AM, Lukas Hejtmanek 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

> 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.

Oleg Drokin
Senior Software Engineer
Whamcloud, Inc.

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