FICO Xpress Optimization Examples Repository: ELS - Solving several model instances in parallel

FICO Xpress Optimization Examples Repository

ELS - Solving several model instances in parallel

Description

This implementation (program: runelsd.* starting submodel: elsd.mos) extends the parallel version of the ELS model to solving of submodels distributed to various computing nodes, showing the following features:

parallel remote execution of submodels
communication between different models (for bound updates on the objective function)
sending and receiving events
stopping submodels

Further explanation of this example: Xpress Whitepaper 'Multiple models and parallel solving with Mosel', Section 'Solving several model instances in parallel'.

runelsxprd.zip

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Source Files

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runelsd.c	[download]
runelsd.java	[download]
elsd.mos	[download]
readelsdem.mos	[download]

Data Files

els.dat

[download]

readelsdem.mos

(!*******************************************************
   Mosel Example Problems
   ======================

   file readelsdem.mos
   ```````````````````
   Read the ELS demand data and write them to memory.

   *** Not intended to be run standalone - run from runelsd.*  ***
   
   (c) 2012 Fair Isaac Corporation
       author: S. Heipcke, Feb 2012
  *******************************************************!)

model "Read Els Demand"
 uses "mmjobs"

 parameters
  DATAFILE = "els4.dat"
  T = 60
  P = 4
  RMT = "rmt:"                         ! Files are on root node
 end-parameters 
 
 declarations
  TIMES = 1..T                         ! Time periods
  PRODUCTS = 1..P                      ! Set of products

  DEMAND: array(PRODUCTS,TIMES) of integer  ! Demand per period
 end-declarations

 initializations from RMT+DATAFILE
  DEMAND
 end-initializations

 initializations to "bin:"+RMT+"Demand"
  DEMAND
 end-initializations
 
end-model