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Calculation Restart Problems
Posted: Wed May 21, 2014 2:42 am
by Design_BIB
Hi,
I had a problem with calculation restart error. I had never do this before. I'm so sorry to take your time with my simple question.
I choose "RESU" folder as restart folder. When I start calculation, the error notice as shown as following ...
/home/design/Downloads/code_saturne-3.2.2/src/base/cs_file.c:554: Fatal error.
Error opening file "restart/main":
No such file or directory
Call stack:
1: 0x7f5891763fcc <+0x1c8fcc> (libsaturne.so.0)
2: 0x7f5891767558 <cs_file_open+0x218> (libsaturne.so.0)
3: 0x7f589177a604 <+0x1df604> (libsaturne.so.0)
4: 0x7f589177b3c7 <cs_io_initialize_with_index+0x197> (libsaturne.so.0)
5: 0x7f5891693851 <cs_restart_create+0x3b1> (libsaturne.so.0)
6: 0x7f5891693ce6 <opnsui_+0x216> (libsaturne.so.0)
7: 0x7f58916e8477 <lecamp_+0x237> (libsaturne.so.0)
8: 0x7f58916e815e <lecamo_+0xa6> (libsaturne.so.0)
9: 0x7f589161908f <caltri_+0x26ef> (libsaturne.so.0)
10: 0x7f58915f1c15 <cs_run+0x3f5> (libsaturne.so.0)
11: 0x7f58915f173a <main+0x14a> (libsaturne.so.0)
12: 0x7f5890d7476d <__libc_start_main+0xed> (libc.so.6)
13: 0x400749 <> (cs_solver)
End of stack
Could anyone tell me ... What does it mean ?
I'm not sure it's happen because of I choose a restart folder in correct way or not. Or it happen with anythings. How do I solve it ??
Add Note!! ::: "/home/design/Downloads/code_saturne-3.2.2" is CS source code. Installation folder of CS 3.2.2 is in "/opt/code_saturne-3.2.2"
Best Regards,
Chayawat T.
Re: Calculation Restart Problems
Posted: Wed May 21, 2014 11:05 am
by ukok
hello
It seems that you didn't select correctly the checkpoint fold from previous calculations.
Sam
Re: Calculation Restart Problems
Posted: Thu May 22, 2014 2:54 am
by Design_BIB
Hello, Sam
Thanks for your reply.
Furthermore, Can you suggest me to choose and try to calculation with restart mode ??
This is my 1st-time to run this mode. Sorry to waste your time.
Best Regards,
Chayawat
Re: Calculation Restart Problems
Posted: Thu May 22, 2014 9:26 am
by ukok
Design_BIB wrote:Hello, Sam
Thanks for your reply.
Furthermore, Can you suggest me to choose and try to calculation with restart mode ??
This is my 1st-time to run this mode. Sorry to waste your time.
Best Regards,
Chayawat
Hi Chayawat,
1. Locate you last run, and find "checkpoint" fold, which is the restart point.
2. In your new run, once you enable the restart mode, you will be ask the checkpoint. then you choose the one found in the step 1. This enables calculation restart from the last run not from zero.
3. Number of iterations must be more than that in the previous run, otherwise it won't work.
Hope this will help!
Sam
Re: Calculation Restart Problems
Posted: Mon May 26, 2014 2:37 am
by Design_BIB
Hello, Sam
Thank you for your reply. Now I've nothing to ask because you SOLVE it for me.
Thanks again Sam.
Best Regard,
Chayawat
Re: Calculation Restart Problems
Posted: Mon Jan 23, 2017 7:09 am
by BruceS
ukok wrote:Design_BIB wrote:Hello, Sam
Thanks for your reply.
Furthermore, Can you suggest me to choose and try to calculation with restart mode ??
This is my 1st-time to run this mode. Sorry to waste your time.
Best Regards,
Chayawat
Hi Chayawat,
1. Locate you last run, and find "checkpoint" fold, which is the restart point.
2. In your new run, once you enable the restart mode, you will be ask the checkpoint. then you choose the one found in the step 1. This enables calculation restart from the last run not from zero.
3. Number of iterations must be more than that in the previous run, otherwise it won't work.
Hope this will help!
Sam
Hi Sam, when I follow these steps I can't see any saved checkpoints to restart from.
Re: Calculation Restart Problems
Posted: Tue Jan 31, 2017 2:42 pm
by Luciano Garelli
Hello BruceS,
Code Saturne by default sets 4 restarts checkpoints during your simulation, you can change this frequency in "Advanced options" in the "Start/Restart" tab. If your simulation does not reach almost the first checkpoint (1/4 of the whole simulation) the directory "checkpoint" will not be created. but, if you have the directory "checkpoint", inside of it you will find two files "auxiliary and main" from where code saturne will take the information for restart. So, when you enable the restart mode you have to choose the "checkpoint" directory, not the files.
Regards,
Luciano
Re: Calculation Restart Problems
Posted: Wed Sep 05, 2018 4:20 pm
by attene
Luciano Garelli wrote: Tue Jan 31, 2017 2:42 pm
Hello BruceS,
Code Saturne by default sets 4 restarts checkpoints during your simulation, you can change this frequency in "Advanced options" in the "Start/Restart" tab. If your simulation does not reach almost the first checkpoint (1/4 of the whole simulation) the directory "checkpoint" will not be created. but, if you have the directory "checkpoint", inside of it you will find two files "auxiliary and main" from where code saturne will take the information for restart. So, when you enable the restart mode you have to choose the "checkpoint" directory, not the files.
Regards,
Luciano
Hi Luciano,
I am a new code saturne user, and at the very beginning: still setting up my first big simulation.
How to do practically a restart from the checkpoint directory? What files do I have to move there?
I can see that in the checkpoint directory there are two files: auxiliary and main; Do they provide information of the 4 restarts checkpoints?
Regards,
FA
Re: Calculation Restart Problems
Posted: Wed Sep 05, 2018 4:54 pm
by Luciano Garelli
Hello,
In order to restart a simulation do you have to go to Calculation management tab and switch on the "calculation restart". After that you have to select the Checkpoint directory of your previous run and set the new number of time steps to be run (Doxygen CS : "For the restart calculations, ntmabs takes into account the number of time steps of the previous calculations. For instance, after a first calculation of 3 time steps, a restart file of 2 time steps is realised by setting ntmabs = 3+2 = 5.").
The checkpoint directory only provides information of the last saved result. You can change the save frequency in the "advanced options" button.
Regards,
Luciano
Re: Calculation Restart Problems
Posted: Wed Sep 05, 2018 5:21 pm
by attene
Hi Luciano,
Thank you for your explanation!
Regards,
FA