Changes between Version 2 and Version 3 of OfflineAdaptParallelization_PDAF3

Timestamp:

Sep 1, 2025, 10:47:59 AM (21 hours ago)

Author:

lnerger

Comment:

--

OfflineAdaptParallelization_PDAF3

@@ -48 +48 @@
 The routine `init_parallel_pdaf`, which is supplied in `templates/offline` and `tutorial/offline_2D_parallel`, initializes the necessary communicators for the assimilation program and PDAF. The routine is called at the beginning of the assimilation program directly after the initialization of the parallelization described above. The provided routine `init_parallel_pdaf` is a template implementation. For the offline mode, it should not be necessary to modify it!
 
-`init_parallel_pdaf` is identical for the online and offline modes. The routine uses the variable `n_modeltasks`. For the offline mode, the provided code sets this variable to 1, because no integrations are performed in the assimilation program. The routine the variables `npes_world`, `mype_world` as well as `npes_filter` and `mype_filter` are defined. Here `npes_world` and `npes_filter` provide the number of processes involved in the program, while `mype_world` and `mype_filter` identify the index of a process (its 'rank'). These variables can be used in the user-supplied routines to control, for example, which process write information to the screen. In the example codes we use 'mype_filter' in the calll-back routines, while we use 'mype_world' in the main part of the code.
+`init_parallel_pdaf` is identical for the online and offline modes. The routine uses the variable `n_modeltasks`. For the offline mode, the provided code sets this variable to 1, because no integrations are performed in the assimilation program. The routine the variables `npes_world`, `mype_world` as well as `npes_filter` and `mype_filter` are defined. Here `npes_world` and `npes_filter` provide the number of processes involved in the program, while `mype_world` and `mype_filter` identify the index of a process (its 'rank'). These variables can be used in the user-supplied routines to control, for example, which process write information to the screen. In the example codes we use `mype_filter` in the call-back routines, while we use `mype_world` in the main part of the code.
 
-`init_parallel_pdaf` defines several more variables that are declared and held in the module `mod_parallel_pdaf`. We recommend to use this module from the provided code as some of these variables are required when the initialization routine of PDAF (`PDAF_init`) is called. 
+`init_parallel_pdaf` defines several more variables that are declared and held in the module `mod_parallel_pdaf`. 
+
+In implementations done with PDAF V3.0 and later, `init_parallel_pdaf` provides the parallelization variables to PDAF by a call to `PDAF3_set_parallel`. Implementations done before do usually not include this call, but provide the variables to PDAF in the call to `PDAF_init`.