Hybrid Optimization Parallel Search PACKage

Software · Tue Nov 10 05:00:00 EST 2009

OSTI ID:1231244

HOPSPACK is open source software for solving optimization problems without derivatives. Application problems may have a fully nonlinear objective function, bound constraints, and linear and nonlinear constraints. Problem variables may be continuous, integer-valued, or a mixture of both. The software provides a framework that supports any derivative-free type of solver algorithm. Through the framework, solvers request parallel function evaluation, which may use MPI (multiple machines) or multithreading (multiple processors/cores on one machine). The framework provides a Cache and Pending Cache of saved evaluations that reduces execution time and facilitates restarts. Solvers can dynamically create other algorithms to solve subproblems, a useful technique for handling multiple start points and integer-valued variables. HOPSPACK ships with the Generating Set Search (GSS) algorithm, developed at Sandia as part of the APPSPACK open source software project.

• Short Name / Acronym: HOPSPACK; 002439WKSTN00
• Version: 00
• Programming Language(s): Medium: X; OS: Linux, Windows, MAC OSX
• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• Sponsoring Organization: USDOE
• Contributing Organization: PLANTENGA,TODD & KOLDA,TAMARA
• DOE Contract Number: DE-AC04-94AL85000
• OSTI ID: 1231244
• Country of Origin: United States