[MPICH] MPI-IO atomic mode

[Rajeev Thakur]

ROMIO knows the semantics of the underlying file system. If the file system
supports POSIX semantics, no flush or fsync is needed.

Rajeev 

> -----Original Message-----
> From: owner-mpich-discuss at mcs.anl.gov 
> [mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of Yong Chen
> Sent: Monday, October 15, 2007 5:45 PM
> To: mpich-discuss at mcs.anl.gov
> Subject: [MPICH] MPI-IO atomic mode
> 
> Hi,
> 
> I have one question about the MPI-IO atomic mode. If we set a file 
> handle as atomic mode, does ROMIO always perform fsync()/flush() for 
> each write? If it doesn't, how it's ensured that each write 
> is available 
> to other processes, as a requirement to guarantee 
> correctness? Thank you!
> 
> Yong
> 
>