Changes between Version 10 and Version 11 of Projects/OpenIFS-IO


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Timestamp:
27/09/13 14:14:04 (6 years ago)
Author:
grenville
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  • Projects/OpenIFS-IO

    v10 v11  
    151151The following section allows you to specify the compute decomposition - this example will use 128 MPI tasks (NPROC), each with 8 OMP threads (NTHREADS). Note NPROC x NTHREADS = 1024 which was the number specified for mppwidth in the header section of the file. EXPID refers to the ECMWF supplied experiment id. RUN is simply a means of distinguishing output from different runs (the names of output directories will be distinguished by RUN). TSTEP is the model time step in seconds (the best value has been determined by ECMWF in general). You probably won't change MASTER or NAMELIST.  
    152152 
    153 The script ifs_run.sh sets up the aprun command based on its arguments. The model resolution is specified through -r (511 in this case) and the length of the model run (in model days) is specified through the -f option  
     153The script ifs_run.sh sets up the aprun command based on its arguments. The model resolution is specified through -r (t511 in this case) and the length of the model run (in model days, one day in this case) is specified through the -f option  
    154154 
    155155 
     
    159159NPROC=128 
    160160NTHREADS=8 
    161 RUN=6 
     161RUN=9 
    162162TSTEP=600 
    163163MASTER=$OIFS_HOME/make/opt/oifs/bin/master.exe 
     
    176176}}} 
    177177 
    178 === Model ouput === 
     178=== Model output === 
    179179 
    180180You can run the model in one of two IO modes. A namelist setting (more later) is all that is required to switch between the model generating its output synchronously through a single processor or asynchronously through multiple processors. Jobs which output large volumes of data benefit significantly in terms of reduced wall clock time by using asynchronous IO (the FDB IO model). The model produces output which is in two sub-directories of the directory from which the model was submitted. For the above example the following files appear