Switch default load balancer to Zoltan with vertex = all cells of a well #5800
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The new loadbalancer approach will create a graph representing the grid where all cells that a well perforates are represented by one vertex. The weight of that cell will be the number of cells it represents. Also the weights of the faces will be added up due to the merging of cells. A cell that is not perforated by any well is still represented by one vertex with weight one. In the old default appoach the number of vertices in the grid was equal to the number of cells. Vertex weights were not used. For each well we added an edge between all its perforated cells for which we did set a very edge weight to force the cells to the same process during partitioning. For realistic cases we have seen improvements across the board due to this. E.g. this resolved convergence issues on hard cases. Because of that this becomes the default with this.
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jenkins build this please |
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I believe the deviations here are large enough to warrant an inspection. |
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jenkins build this failure_report please |
This seems to be needed for the new partitioning with cells of a well merged to one vertex.
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jenkins build this please |
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The new loadbalancer approach will create a graph representing the grid where all cells that a well perforates are represented by one vertex. The weight of that cell will be the number of cells it represents. Also the weights of the faces will be added up due to the merging of cells. A cell that is not perforated by any well is still represented by one vertex with weight one.
In the old default approach the number of vertices in the grid was equal to the number of cells. Vertex weights were not used. For each well we added an edge between all its perforated cells for which we did set a very edge weight to force the cells to the same process during partitioning.
For realistic cases we have seen improvements across the board due to this. E.g. this resolved convergence issues on hard cases. Because of that this becomes the default with this.