On 03/10/2014 08:45 AM, Kist wrote:
Hi!
I'm testing OrangeFS (pvfs2) in a small virtual cluster before we try it
on a big cluster for seismic processing.
I am running 8 CentOS with 2.6 kernel. All of them are servers (io) and
clients and the headnode is the metadata server.
So far it's the best DFS I found and our standalone tools are working
alright on it but when I try to use our libraries with a different
client (as a plugin in another tool) I get a "Function not implemented"
error.
I have no access to the source code of the client I'm using and, now,
I'm looking for the pvfs2 source code for "PVFS_ENOSYS" ("Function not
implemented") references but it seems a little bit more work than it
should be.
So, I would like to know if you guys have some ideas of what could it be
(lock?) or some magic flag I can set to check what is this.
If you are using the kernel interface, the one routine we've explicitly
disabled is fcntl() with the F_SETLKW and related flags.
slang did this years and years ago
http://www.orangefs.org/fisheye/orangefs/changelog/orangefs?cs=6613
The other thing to look at is certain kinds of mmap operations, but I
never, even at my peak, remembered all the various details about that one...
==rob
--
Rob Latham
Mathematics and Computer Science Division
Argonne National Lab, IL USA
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