open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello,

I would like run a simulation in parallel on a large number nodes, each with several cores, then use that simulation result to continue the computation on a single node with several cores. The continued computation will contain drogues, but the first will not. Is it ok to switch between node configurations when performing a continued computation, or will this introduce inaccuracies into the results?

Thank you,
Taylor

Hello Taylor,

With many examples (except basins at rest maybe), you have differencies between parallel and sequential runs with restart.
If you want to have perfect restart without loss of accuracy, you should:
- use RESTART MODE = YES for your initial run (see the TELEMAC-3D user manual and the canal example) and rerun your computation from the generated file with RESTART MODE = YES),
- use the same number of nodes and cores,
- use the sampe configuration (computer, compiler etc.).

Hope this helps,

Chi-Tuan

That is very helpful, thank you!