Thank you, Timo I will look into it!
David On Sat, Oct 10, 2020 at 11:30 AM Timo Heister <heis...@clemson.edu> wrote: > Hi David, > > > For example, for the initial conditions, the code is supposed to output > a file with name: > > > > solution-0000000.vtu > > > > but then it also creates s file with name > > > > solution-0000000.vtu-1364024289-50151.lock > > > > This is what the support from the cluster told us about the issue: > > The code you posted uses MPI I/O for parallel output. This lock file > is created by the operating system and to me it looks like the > filesystem you are writing to might be an NFS storage that is not set > up to work well with parallel IO. Generally, NSF is not a great option > for performance. It might also be that the file system is not > configured correctly. > > I have a few suggestions: > 1. Use a real parallel file system for IO (most clusters have support > for a fast parallel file system and a slow home directory on NSF) > 2. Change the code to not use parallel IO (replace > write_vtu_in_parallel by a call to write_vtu_with_pvtu_record() and > set n_groups = 0). This is slower, especially for large computations > with 100+ cores. You might need to change a couple of lines of code. > 3. Talk to the admins to change/update the MPI implementation > (assuming this actually is a parallel file system) > > Best, > Timo > > > -- > Timo Heister > http://www.math.clemson.edu/~heister/ > > -- > The deal.II project is located at http://www.dealii.org/ > For mailing list/forum options, see > https://groups.google.com/d/forum/dealii?hl=en > --- > You received this message because you are subscribed to the Google Groups > "deal.II User Group" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to dealii+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/dealii/CAMRj59E1v%2BN3%3DXfmqLPV3NX_hhNuG_zwoMsejs_2b_6CL1Grng%40mail.gmail.com > . > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/CAJdNbL867m4E0GVnq3q7qSVnv%3Dc4BRsD%2BsJN-H5tMug%3D77zh2Q%40mail.gmail.com.
