[Lustre-discuss] MPI-IO / ROMIO support for Lustre

[Mark Dixon]

Hi,

I'm trying to get the MPI-IO/ROMIO shipped with OpenMPI and MVAPICH2 
working with our Lustre 1.8 filesystem. Looking back at the list archives, 
3 different solutions have been offered:

1) Disable "data sieving"         (change default library behaviour)
2) Mount Lustre with "localflock" (flock consistent only within a node)
3) Mount Lustre with "flock"      (flock consistent across cluster)

However, it is not entirely clear which of these was considered the 
"best". Could anyone who is using MPI-IO on Lustre comment which they 
picked, please?

I *think* the May 2008 list archive indicates I should be using (3), but 
I'd feel a whole lot better about it if I knew I wasn't alone :)

Cheers,

Mark
-- 
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Mark Dixon                       Email    : m.c.dixon at leeds.ac.uk
HPC/Grid Systems Support         Tel (int): 35429
Information Systems Services     Tel (ext): +44(0)113 343 5429
University of Leeds, LS2 9JT, UK
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