Changes between Version 1 and Version 2 of Ticket #4


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Timestamp:
04/01/20 15:47:25 (4 years ago)
Author:
arango
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  • Ticket #4 – Description

    v1 v2  
    168168As shown in the above figure, the algorithm, for example, is run for four days from '''Jan 3''' to '''Jan 7'''.  The time integration is divided into four intervals of 24 hours in length.  The ROMS MPI communicator is split into four-time ('''Nsaddle=4''') sections of different colors.  Each disjointed color has the same number of processes '''NtileI(ng)*NtileJ(ng)''' and runs the tangent linear and adjoint models concurrently on each interval independent of each other. The nonlinear model before the outer loop is run in the first color for the full period of '''Jan 3''' to '''Jan 7'''.  However, the nonlinear model at the end of the inner loops is run concurrently by intervals by all colors.
    169169
    170 If '''NtileI(ng) = 2''', '''NtileJ=4''', and '''Nsaddle=4''' the execution is started as:
     170If '''NtileI=2''', '''NtileJ=4''', and '''Nsaddle=4''' the execution is started as:
    171171 {{{
    172172mpirun -np 32 romsM roms.in > & err &