Editing Input syntax manual (section)

=== set repro ===

 '''set repro''' ''MODE''
Sets the reproducibility mode in parallel calculations. Input values:

{|
| <tt>''MODE''</tt>
| : reproducibility mode (default value: 1)
|}

The possible settings for mode are:

::{| class="wikitable" style="text-align: left;"
! Mode
! Description
|-
| <tt>0</tt>
| No reproducibility
|-
| <tt>1</tt>
| Reproducibility with OpenMP parallelization
|-
| <tt>2</tt>
| Reproducibility with MPI and hybrid OpenMP / MPI parallelization
|}

<u>Notes:</u>
*The reproducibility in OpenMP parallelization means that the random number sequences are the same in spite of parallelization. 
**This requires that the histories are calculated always in the same order, which is achieved by sorting the fission banks between batches.
**With large neutron populations per batches the sorting takes a substantial amount of time which might affect the obtained parallel calculation scalability.
*The reproducibility is often a requirement for debugging the program. <tt>''MODE''</tt> 2 should only be used for debugging.