A Dynamic Load Balancing Mechanism for New ParaLEX

ParaLEX, developed recently by the authors, is a parallel extension for the CPLEX mixed integer optimizer which is known as one of the fastest commercial solvers for the mixed integer programming problems. In our previous work, we showed that ParaLEX could efficiently perform 30 solver parallelizations. On the other hand, the simple load balancing mechanism of ParaLEX did not obviously have scalability. In this paper, we propose a load balancing mechanism for a new version of ParaLEX. Preliminary computational results show that the load balancing mechanism is quite efficient in solving a lot of classes of problem instances.