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Compiling the Distributed Version.

Please note that the distributed-memory parallel version has not been tested in Version 5.0 and may be broken. Please let me know if you want to use it and I will get it working.

• If you wish to compile a distributed version of the code, obtain and install the Parallel Virtual Machine (PVM) software, available for free from Oak Ridge National Laboratories . See Section 6.7.1 for more notes on using PVM.

• In SYMPHONY-5.0/Makefile, be sure to set the COMM_PROTOCOL to PVM. Also, in the same makefile, you need to change one or more of SYM_COMPILE_IN_TM, SYM_COMPILE_IN_LP, SYM_COMPILE_IN_CG, and SYM_COMPILE_IN_CP to FALSE or you will end up with the sequential version. Various combinations of these variables will give you different configurations and different executables. See Section 6.7.1 for more info on setting them. Also, be sure to set the path variables in the makefile appropriately so that make can find the PVM library.

• As above, type make in the SYMPHPONY-5.0 subdirectory to make the distributed libraries. As in Step 1 of the sequential version, you may type make clean after making the library. It should not have to remade again unless you modify SYMPHONY's internal files.

• After the SYMPHONY libraries, main function will be compiled and required executables linked.

• Make sure there are links from your $(PVM_ROOT)/bin/$(PVM_ARCH) subdirectory to each of the executables in the SYMPHONY-5.0/bin.$(ARCH)/$(LP_SOLVER) subdirectory. This is required by PVM.

• Start the PVM daemon by typing pvm on the command line and then typing quit.

• As above, test SYMPHONY using the sample MPS file called sample.mps included with the distribution. To specify the file name, use the -F command-line option, i.e., type bin.$(ARCH)/$(LP_SOLVER)/symphony -F sample.mps in the SYMPHONY-5.0 subdirectory. To obtain more MPS data files for further testing, download the MIPLIB library.

• That's it! Now, you are ready to develop your own application using SYMPHONY callable library or solve MILP problems using the executable.