Andreas Dilger wrote: > On Mar 11, 2008 16:10 -0600, Marty Barnaby wrote: >> I'm not actually sure what ROMIO abstract device the multiple CFS >> deployments I utilize were defined with. Probably just UFS, or maybe NFS. >> Did you have a recommended option yourself. > > The UFS driver is the one used for Lustre if no other one exists. > >> Besides the fact that most of the adio that were created over the years are >> completely obsolete and could be cleaned from ROMIO, what will the new one >> for Lustre offer? Particularly with respect to controls via the lfs utility >> that I can already get? > > There is improved collective IO that aligns the IO on Lustre stripe > boundaries. Also the hints given to the MPIIO layer (before open, > not after) result in lustre picking a better stripe count/size. >
In addition, the one integrated into MPICH2-1.0.7 contains direct I/O support. Lockless I/O support was purged out due into my lack of confidence in low-level file system support. But it can be revived when possible. -- Weikuan Yu <+> 1-865-574-7990 http://ft.ornl.gov/~wyu/ _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
