Minimal parameters setting

Before using the parallel implementation it is compulsory to set some variables:

• `ALIAS/bisection_master`: the number of unprocessed boxes that the master will have to generate before dispatching the boxes to the slaves (default value: 30). It is also the bound on the number of unprocessed boxes that the master will compute when all the slaves are busy before checking again if any slave is free (within the master algorithm there is a mechanism to monitor if a slave has completed its calculation but stopping the master algorithm allows to ensure that all the computation is not done by the master). This number should be small so that the master is not doing any heavy computation while the slaves are waiting for boxes. This variable corresponds to the C++ variable ALIAS_Parallel_Max_Bisection
• `ALIAS/working_directory`: the full path of the directory in which the C++ master and slave programs will be created
• `ALIAS/pvm`: the path of the include files for the pvm library e.g. "/u/caphorn/PVM/pvm3/include"
• `ALIAS/libpvm`, `ALIAS/libpvm_linux`: the path of the pvm library respectively for SUN and LINUX PC's. You should have typically something looking like "/u/caphorn/PVM/pvm3/lib/SUN4SOL2" and "/u/caphorn/PVM/pvm3/lib/LINUX"
• `ALIAS/gpp_sun`, `ALIAS/make_sun`: the full path for the C++ compiler and the make program for SUN workstation. Typically "/usr/local/bin/g++" and "/usr/ccs/bin/make"
• `ALIAS/gpp_linux`, `ALIAS/make_linux`: same for PC's under linux.

Hence a typical Maple file for solving a system of equations EQ in the variable VAR within the ranges S on a mixture of SUN and PC will be:

 
`ALIAS/profilN`:="/net/coprin/intervalles/Profil-linux":
`ALIAS/libN`:="/net/coprin/intervalles/Lib-linux":
`ALIAS/working_directory`:="/u/Interval/Maple":
`ALIAS/bisection_master`:=2:
`ALIAS/diam_switch`:=0.3:
`ALIAS/bisection_slave`:=15:
ParallelHessianSolve(ef2,VAR,S,["otway","molotova"],[[30,4000],[30,4000]]);

As soon as the Maple procedure run two C++ program will be generated: one contained the keyword MASTER, the other one with the keyword SLAVE. The program MASTER will be compiled on the machine that run Maple and will control the process. The program that will run the slaves is the SLAVE program: one or two such programs will be generated according to the architecture of the slave computers (slave program running on a Sun workstation will have their name ended by SUN while the program running under Linux will be ended by LINUX).