ILOG CPLEX 10.2 User's Manual > Continuous Optimization > Solving LPs: Barrier Optimizer > Interpreting the Barrier Log File |
Interpreting the Barrier Log File |
INDEX
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Like the ILOG CPLEX simplex optimizers, the barrier optimizer records information about its progress in a log file as it works. Some users find it helpful to keep a new log file for each session. By default, ILOG CPLEX records information in a file named cplex.log
. In the:
set logfile filename
to change the name of the log file.
CPXsetlogfile
with arguments to indicate the log file.
You can control the level of information that ILOG CPLEX records about barrier optimization by setting the BarDisplay
parameter. Those settings appear in Table 9.4.
BarDisplay Values |
Meaning |
---|---|
0 |
no display |
1 |
display normal information (default) |
2 |
display detailed (diagnostic) output |
Here is an example of a log file for a barrier optimization (without crossover):
The opening lines of that log file record information about preprocessing by the ILOG CPLEX presolver and aggregator. After those preprocessing statistics, the next line records the number of nonzeros in the lower triangle of a particular matrix, AAT, denoted A*A
' in the log file.
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