Search found 10 matches

by konsole
Wed Aug 08, 2018 1:18 am
Forum: ROMS Discussion
Topic: puzzle: write long time averages over many restarts
Replies: 1
Views: 520

puzzle: write long time averages over many restarts

He all, I have a puzzle that I couldn't quite solve yet. We're restarting the a computationally expensive run every 5 days, but want to write out monthly averages (our 1 month = 365/12 days). Apparently when ROMS writes out averages after roughly 5 restarts it just considers timesteps from the curre...
by konsole
Tue Jul 31, 2018 11:07 am
Forum: ROMS Problems
Topic: huge memory per node when up scaling application
Replies: 14
Views: 2127

Re: huge memory per node when up scaling application

I'm working on a distributed memory cluster that offers nodes with either 16 processors (32 or 64gb memory available), or with 28 processors (128 or 256 gb memory available). I use the following software to compile and run roms: intel-fc/2018.1.163, netcdf/4.6.1p (p stands for parallel), openmpi/3.1...
by konsole
Sun Jul 29, 2018 10:35 am
Forum: ROMS Problems
Topic: huge memory per node when up scaling application
Replies: 14
Views: 2127

Re: huge memory per node when up scaling application

ok, I think we are a step further here. I've managed to run PARALLEL_IO successfully with the most recent ROMS version and the UPWELLING and INLET_TEST test cases. It also works for my application, when I just write out 2D fields. However, when I start writing out 3D fields the run crashes with a my...
by konsole
Fri Jul 27, 2018 7:41 am
Forum: ROMS Problems
Topic: huge memory per node when up scaling application
Replies: 14
Views: 2127

Re: huge memory per node when up scaling application

I get the same error with both, nc4 and nc7. Did it ever work for you Kate? If so, which versions of netcdf4, openmpi and hdf5 did you use?

Thanks
by konsole
Fri Jul 27, 2018 5:18 am
Forum: ROMS Problems
Topic: huge memory per node when up scaling application
Replies: 14
Views: 2127

Re: huge memory per node when up scaling application

The bug with mpi_collect has been fixed in the latest version of ROMS. I've managed to compile updating nf_fread2d.f90. Now I get a different error during initialization: INITIAL: Configuring and initializing forward nonlinear model ... ******* NETCDF_OPEN - unable to open existing NetCDF file for p...
by konsole
Thu Jul 26, 2018 5:16 am
Forum: ROMS Problems
Topic: huge memory per node when up scaling application
Replies: 14
Views: 2127

Re: huge memory per node when up scaling application

I've checked with the supercomputer support team and they are confident that we create the right environment for parallel IO to work. When I activate PARALLEL_IO and HDF5, I get the following error message: cd Build; /apps/openmpi/wrapper/fortran/mpif90 -c -heap-arrays -fp-model precise -ip -O3 nf_f...
by konsole
Wed Jul 25, 2018 1:39 pm
Forum: ROMS Problems
Topic: huge memory per node when up scaling application
Replies: 14
Views: 2127

Re: huge memory per node when up scaling application

Hey Kate, thanks for your reply. I/O could explain my weird HPC errors maybe. I wasn't aware how ROMS manages IO and did not have any parallel options active. I tried activating PARALLEL_IO in combination with either HDF5 or PNETCDF flags. My activated makefile options are USE_MPI, USE_NETCDF4, USE_...
by konsole
Wed Jul 25, 2018 6:27 am
Forum: ROMS Problems
Topic: huge memory per node when up scaling application
Replies: 14
Views: 2127

huge memory per node when up scaling application

Dear experienced ocean modellers, When I up scale my application from 10 km to 2 km resolution, I have trouble getting the model running with a sensible tiling. Please see here a table with previous successful and failed runs and the heads of the error messages at the end of the post: Resolution (km...
by konsole
Wed Aug 09, 2017 11:30 am
Forum: ROMS Discussion
Topic: SSH tides cause blow up in corner of big domain
Replies: 2
Views: 945

Re: SSH tides cause blow up in corner of big domain

Thanks Kosa, ramping the tides seems just to delay the issue by a couple of timesteps. Anyway, we tried a test with flat bathymetry and it did not blow up. So I looked at the corner bathy in more detail and found this mountain ridges, which form a little triangle exact in the corner. modelbathy_corn...
by konsole
Tue Aug 01, 2017 10:15 pm
Forum: ROMS Discussion
Topic: SSH tides cause blow up in corner of big domain
Replies: 2
Views: 945

SSH tides cause blow up in corner of big domain

Dear ROMS users, If I force my whole Antartic application with tidal surface elevation at the northern boundaries, I get this strange response in one of the corners (figure shows surface elevation anomaly): ssh_blowup.png The figure relates to the following simplified case: ​*Initialization with no ...