users-boun...@open-mpi.org a écrit sur 01/12/2012 14:47:09 : > De : Eric Chamberland <eric.chamberl...@giref.ulaval.ca> > A : us...@open-mpi.org > Date : 01/12/2012 14:47 > Objet : [OMPI users] Lustre hints via environment variables/runtime parameters > Envoyé par : users-boun...@open-mpi.org > > Hi, > > I am using openmpi 1.6.3 with lustre. I can change the stip count via > "striping_unit" but if I try to change the stripe size via > "striping_factor", all my options are ignored and fall back on the > default values. > > Here is what I do: > > ============================= > setenv ROMIO_HINTS /home/ericc/romio-hints > > cat $ROMIO_HINTS > striping_unit 16 > striping_factor 1048576
try with: striping_unit 1048576 striping_factor 16 (stripe_size means striping_unit and stripe_count means striping_factor) > > rm temp ; mpirun -n 3 idx2 ; lfs getstripe temp > > temp > lmm_stripe_count: 1 > lmm_stripe_size: 65536 > lmm_stripe_offset: 28 > obdidx objid objid group > 28 23877295 0x16c56af 0 > > ============================= > > If I remove the "striping_factor 1048576" entry in my hint file, I get this: > > ============================= > cat $ROMIO_HINTS > striping_unit 16 > #striping_factor 1048576 > > rm temp ; mpirun -n 3 idx2 ; lfs getstripe temp > > temp > lmm_stripe_count: 36 > lmm_stripe_size: 65536 > lmm_stripe_offset: 21 > obdidx objid objid group > 21 27078098 0x19d2dd2 0 > 5 26516786 0x1949d32 0 > 18 26272707 0x190e3c3 0 > 2 22198271 0x152b7ff 0 > 14 24302770 0x172d4b2 0 > 16 20970007 0x13ffa17 0 > 28 23877307 0x16c56bb 0 > 6 25726827 0x1888f6b 0 > 31 23623835 0x168789b 0 > 23 24231103 0x171bcbf 0 > 34 23963185 0x16da631 0 > 3 23462711 0x1660337 0 > 13 27515658 0x1a3db0a 0 > 26 23502238 0x1669d9e 0 > 7 26708491 0x1978a0b 0 > 32 21946148 0x14edf24 0 > 17 26912937 0x19aa8a9 0 > 4 24586434 0x17728c2 0 > 27 23277776 0x16330d0 0 > 9 23634614 0x168a2b6 0 > 11 25769779 0x1893733 0 > 33 24915767 0x17c2f37 0 > 29 20790315 0x13d3c2b 0 > 8 25647332 0x18758e4 0 > 20 26938873 0x19b0df9 0 > 19 26182463 0x18f833f 0 > 12 25346469 0x182c1a5 0 > 15 25681819 0x187df9b 0 > 24 23898261 0x16ca895 0 > 10 26554081 0x1952ee1 0 > 25 23512409 0x166c559 0 > 0 28428909 0x1b1ca6d 0 > 30 23953009 0x16d7e71 0 > 22 24117691 0x17001bb 0 > 35 20972494 0x14003ce 0 > 1 25492821 0x184fd55 0 > ============================= > > And if I don't put anything in the file, I get this: > > ============================= > cat $ROMIO_HINTS > #striping_unit 16 > #striping_factor 1048576 > > rm temp ; mpirun -n 3 idx2 ; lfs getstripe temp > > temp > lmm_stripe_count: 1 > lmm_stripe_size: 1048576 > lmm_stripe_offset: 18 > obdidx objid objid group > 18 26272802 0x190e422 0 > > ============================= > > which are the default values of our lustre. > > Any idea? > > Thanks, > > Eric > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
