I'm still a beginner in CPLEX and I have a program which I want to model with the constraints and objective function. I have a cloud architecture which contain J data center and each data center has a set of resources, and a set of requests and each request has its requirements. To solve this problem, i created a boolean varibale y(ijk) which take 1 if the resource k in the center j can fit my request i and 0 otherwise. So from the set of resource where the y(ijk)==1, i have to select the first site and the first resource to serve my request i. That's why i created two other boolean variable z(ij) which take 1 if the center n° j is the first center and x(ijk) is equal to 1 if k is the the first resource of the first center j that fit my request. I chose for this this two constraints: (j + 1) zij <= (s + 1) yijk (k + 1) xijk <= (r + 1) * yijk zij. But in vain i coudn't select the adequate resource. Can someone help me please. Thank's in advance.

asked 07 Mar '14, 05:45

Ouali's gravatar image

Ouali
11
accept rate: 0%

closed 16 May '14, 09:08

fbahr's gravatar image

fbahr ♦
4.6k716

That use case sounds similar to Roadef2012's Machine Reassignment and my Cloud Balancing. Both cases have been implemented in multiple frameworks. No idea if anyone implemented either in CPLEX yet, try googling for "cplex machine reassignment" etc.

(07 Mar '14, 06:28) Geoffrey De ... ♦
4

You should not ask the same question twice... You asked it here: https://www.or-exchange.org/questions/9378/cplex-problem

(07 Mar '14, 08:06) jfpuget

The question has been closed for the following reason "Duplicate Question" by fbahr 16 May '14, 09:08

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here

By RSS:

Answers

Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text](http://url.com/ "Title")
  • image?![alt text](/path/img.jpg "Title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Tags:

×191

Asked: 07 Mar '14, 05:45

Seen: 424 times

Last updated: 16 May '14, 09:08

OR-Exchange! Your site for questions, answers, and announcements about operations research.