Knowledgebase
Can DesignBuilder make use of extra processors (e.g. 4 core)?
Posted by Andy Tindale on 02-Nov-16 09:47 AM

EnergyPlus 7.1 and later can make use of multiple threads through parallel processing. To make use of this set the "Maximum number of threads" to be used by EnergyPlus on the EnergyPlus tab of the Program options dialog. However experience suggests that this only speeds up execution in certain cases and in many other cases can slow down the simulation while hogging all computer processor resources. 

DesignBuilder v4 includes an Simulation Manager which makes best use of spare processing capacity to run multiple simultaneous simulations. Results can be browsed and loaded when they are ready. The Simulation Manager allows multiple parallel simulations to be run on:

  1. The machine that is running DesignBuilder to make the most of any free processors,
  2. On a server in the local area network and
  3. On the cloud where it will be possible to run simulations on remote computers

Regardless of these new capabilities, it is usually worth having 4 cores if you run a lot of simulations as it will allow you to continue to use your computer without much (if any) slowdown in machine performance.