[CHiPPS] Some Problem About Using Blis

[化高峰]

Dear Sir，

I have two questions about BLIS.

First, I have used it to solve a IP problem successfully in about 30
seconds.

But when I disable the cutStretagy (setted in the par file) it cannot solve
the same problem using best-first or best-estimate search strategy.

It will cause the MPI to abort saying “one task is killed and other tasks
is terminated.”

When using the depth-first, it reached the setted nodelimate 1 million

Will BLIS use normal BB when the cutStretagy is disabled?

Or am I wrong to only disable the cutstretagy without changing other
options?

Or the efficiency difference between cut and normal BB are so large?

Why it can not solve the IP problem?

Our IP model has 75861 rows, 115173 columns and 1417123 elements(MPS file)

Second, the Blis_heurStrategy and Blis_cutStrategy have an auto option.

If auto is on when will it do or not do heuristic or cut?


Thank you very much.
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