On Sun, 2007-07-22 at 16:09 -0600, Marty Barnaby wrote: > I'm attempting to establish an absolute maximum, byte-rate performance > value, running a bare bones MPI_File_write_all_at benchmark program, for > our Cray XT3 installation, RedStorm, here at Sandia National > Laboratories. Processor time is at a premium, and I only run in the > standard queue, so I'm not able to do everything I would imagine, though > maybe what I can run is adequate. > > I have a directory under our Lustre, redstorm:/scratch_grande which I > have defined with: > > lfs setstripe -1 0 -1 > > Though there are 320 OST's comprising the FS, these defaults give me a > stripe_count of 160 (I'm sure someone could explain that), and I don't > know the stripe_size.
Lustre can currentlt stripe over a maximum of 160 OSTs. (This is a limitation due to the maximum extended attribute size available on the MDT.) The default stripe_size can be seen at /proc/fs/lustre/lov/lustre-mdtlov/stripesize. Thanks, Kalpak. _______________________________________________ Lustre-discuss mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-discuss
