4 Orange partition

Each partition is an ensemble of segments in the global domain. Each segment is described by its global offset and its local extent. In this case, we have ig_paral(1:N) where N = 2 + 2*number of segments

• ig_paral(1) = 3 (indicates a Orange partition)
• ig_paral(2) = the total number of segments for the partition (limited to 200 presently, see note for ig_paral(4) for Box partition above)
• ig_paral(3) = the first segment global offset
• ig_paral(4) = the first segment local extent
• ig_paral(5) = the second segment global offset
• ig_paral(6) = the second segment local extent
• ...
• ig_paral(N-1) = the last segment global offset
• ig_paral(N) = the last segment local extent

Figure 2.5 illustrates an Orange partition with 3 segments for one process. The other process partitions are not illustrated.

Figure 2.5: Orange partition for one process. It is assumed here that the global index starts at 0 in the upper left corner.