Hi Kevin, Yes, I am using mpich2-1.0.8 and pvfs2.8.0.
Regards, Christina. On Tue, Jul 14, 2009 at 12:40 PM, Kevin Harms<[email protected]> wrote: > Christina, > > you are using MPICH2 and the ad_pvfs2 romio module? > > kevin > > On Jul 14, 2009, at 9:12 AM, Christina Patrick wrote: > >> Hi Everybody, >> >> I want to use MPI hints to create a striped file across a subset of >> the pvfs2 servers. For that I use, the hints "striping_unit" and >> "striping_factor". I have a set of three I/O servers. However, I want >> to create the file only on one I/O server. I specified "striping_unit" >> = 65536 and "striping_factor" = 1. However, after the file is created, >> I get the following results: >> >> pvfs2-viewdist -f /home/mdl/patrick/pvfs2/oneserver >> dist_name = simple_stripe >> dist_params: >> strip_size:65536 >> >> Metadataserver: tcp://aum14:7000 >> Number of datafiles/servers = 3 >> Datafile 0 - tcp://aum15:7000, handle: 9223372036854775298 >> (7ffffffffffffe02.bstream) >> Datafile 1 - tcp://aum13:7000, handle: 4611686018427387650 >> (3fffffffffffff02.bstream) >> Datafile 2 - tcp://aum14:7000, handle: 4611686018427387905 >> (4000000000000001.bstream) >> >> Am I missing something? I wanted to use this hint, so that I don't >> have to reconfigure the servers everytime, I want to change the number >> of I/O servers. >> Could somebody please help me? >> >> Thanks and Regards, >> Christina. >> >> PS: The extract from my program which does this: >> 79 MPI_Info_create(&file_info); >> 80 >> 81 if(argc > 1) { >> 82 stripe_unit = atoi(argv[1]); >> 83 sprintf(stripe_unit_str, "%d", stripe_unit); >> 84 MPI_Info_set(file_info, "striping_unit", stripe_unit_str); >> 85 } >> 86 >> 87 if(argc > 2) { >> 88 stripe_factor = atoi(argv[2]); >> 89 sprintf(stripe_factor_str, "%d", stripe_factor); >> 90 MPI_Info_set(file_info, "striping_factor", stripe_factor_str); >> 91 } >> 92 >> 93 MPI_File_open(MPI_COMM_WORLD, fname, MPI_MODE_CREATE | >> MPI_MODE_WRONLY, file_info, &fhandle); >> _______________________________________________ >> Pvfs2-developers mailing list >> [email protected] >> http://www.beowulf-underground.org/mailman/listinfo/pvfs2-developers > > _______________________________________________ Pvfs2-developers mailing list [email protected] http://www.beowulf-underground.org/mailman/listinfo/pvfs2-developers
