[gmx-developers] Re: flushing files

Roland Schulz roland at utk.edu
Wed Oct 13 21:27:50 CEST 2010

On Wed, Oct 13, 2010 at 5:18 AM, Sander Pronk <pronk at cbr.su.se> wrote:

> Just out of curiosity: how long does MPI_File_sync take?
For serial it takes as long as a fsync. Which can take between approximately
1-40ms depending on your machine and file-system. Thus this already becomes
an issue for very frequent writing.
For parallel writing (100nodes) it can be 1-4s for a MPI_File_sync. Thus no
problem if done every 15min but not OK after each frame.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://maillist.sys.kth.se/pipermail/gromacs.org_gmx-developers/attachments/20101013/55c2eae0/attachment.html>

More information about the gromacs.org_gmx-developers mailing list