Box partition

Each partition is a rectangular region of the global domain, described by the global offset of its upper left corner, and its local extents in the X and Y dimensions. The global extent in the X dimension must also be given. In this case, we have ig_paral(1:5):

• ig_paral(1) = 2 (indicates a Box partition)
• ig_paral(2) = the upper left corner global offset
• ig_paral(3) = the local extent in x
• ig_paral(4) = the local extent in y³
• ig_paral(5) = the global extent in x.

Figure 4.2 illustrates a Box partition over 3 processes.

Figure 4.2: Box partition. It is assumed here that the index start at 0 in the upper left corner.

Footnotes

... y³

The maximum value of the local extent in y is presently 338; it can be increased by modifying the value of Clim_MaxSegments in oasis3/lib/clim/src/mod_clim.F90 and in oasis3/lib/psmile/src/mod_prism_proto.F90 and by recompiling OASIS3 and the PSMILe library.