Question with aggregation using METIS

[txthpc]

Hi, thanks for your previous reply to the compilation question.

I have another question to discuss with you about aggregating using Metis.

Due to Metis limitation on the number of segmented subgraphs, when the fine-grid layer matrix is large enough, Metis cannot aggregate enough coarse nodes (for example, the fine-grid layer has a million nodes, each two of which aggregates into points on the next layer of the grid, which will result in about 500,000 aggregates, and Metis cannot split a graph of this size). Do you have any good suggestions for this situation?

I look forward to receiving your reply, and I will benefit from any help you give me.

Best wishes