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Restart in batchmode

Posted Dec 6, 2017, 3:27 a.m. EST General Version 5.3 2 Replies

Staffan H
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Hi, I want to terminate an analysis in batchmode and then restart it at the last saved point (I have not used "-autosave on" which I guess I have to, but assume I have for now). I can open up the GUI, create a new study and use initial values from the previous study but I don't want to do that, I want to do it using a command line command (since e.g. if i run from a .class file then that is not possible or if I have no graphics available). Does anyone know?

Regards Staffan

2 Replies Last Post Dec 7, 2017, 1:35 a.m. EST
Jim Freels mechanical side of nuclear engineering, multiphysics analysis, COMSOL specialist
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Posted: 7 years ago Dec 6, 2017, 4:51 p.m. EST

In linux, you stop a running process with the kill command. In windows, you can use the task manager or an equivalent command. Then you will start your batch job again using a command line similar to this:

comsol batch -inputfile fn.ext -outputfile fn2.ext -recover -continue

Use the comsol batch -help to see all the options available in the batch mode of comsol. Also, see the COMSOL documentation on batch.

Batch options:

-alivetime <seconds> The time between writing status on disc -batchlog <log filename> File to store log in -checklicense <filename> Print license requirement for an mph file -client Run as client -continue Continue computation -dev <filename> Path to a JAR-file with additional classes to call from the batch class file -error <{on}|off> Stop if an error occurs -graphics Display graphics -host <hostname> Connect to host <hostname> -inputfile <filename> The input file name (.mph or .class) -job <job name> The batch job to run -nosave Do not save the resulting model -outputfile <filename> The output file name (if not specified the input file name is used) -paramfile <filename> Table file containing parameter names in the first row and parameter values in the following rows -pindex <parameter indices> Comma separated list of parameter indices -plist <parameter values> Comma separated list of parameter values -pname <parameter name> Comma separated list of parameter names -port <port number> Connect to port <port number> -recover Recover and continue computation -stoptime <seconds> The time the batch job is allowed to run before it is stopped -study <study name> The study to compute

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James D. Freels, Ph.D., P.E.
In linux, you stop a running process with the kill command. In windows, you can use the task manager or an equivalent command. Then you will start your batch job again using a command line similar to this: comsol batch -inputfile fn.ext -outputfile fn2.ext -recover -continue Use the comsol batch -help to see all the options available in the batch mode of comsol. Also, see the COMSOL documentation on batch. Batch options: -alivetime The time between writing status on disc -batchlog File to store log in -checklicense Print license requirement for an mph file -client Run as client -continue Continue computation -dev Path to a JAR-file with additional classes to call from the batch class file -error Stop if an error occurs -graphics Display graphics -host Connect to host -inputfile The input file name (.mph or .class) -job The batch job to run -nosave Do not save the resulting model -outputfile The output file name (if not specified the input file name is used) -paramfile Table file containing parameter names in the first row and parameter values in the following rows -pindex Comma separated list of parameter indices -plist Comma separated list of parameter values -pname Comma separated list of parameter names -port Connect to port -recover Recover and continue computation -stoptime The time the batch job is allowed to run before it is stopped -study The study to compute
Staffan H
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Posted: 7 years ago Dec 7, 2017, 1:35 a.m. EST

Thank you, I used "comsol -h" not "comsol batch -h", that was sloppy of me. A follow up question is that if I have run an analysis and it has either finished, been terminate by me or not converged and I want to continue with a new study from the command line (perhaps with other parameters for time incrementation, different mass scaling, using a different solver, using different BC etc.). How do I do that? [I want to do something similar as in Abaqus, where using *restart, read in the inp-file (call it newjob) and then abq -job=newjob -oldjob=terminated_job from the command line] /Staffan

Thank you, I used "comsol -h" not "comsol batch -h", that was sloppy of me. A follow up question is that if I have run an analysis and it has either finished, been terminate by me or not converged and I want to continue with a new study from the command line (perhaps with other parameters for time incrementation, different mass scaling, using a different solver, using different BC etc.). How do I do that? [I want to do something similar as in Abaqus, where using \*restart, read in the inp-file (call it newjob) and then abq -job=newjob -oldjob=terminated\_job from the command line] /Staffan

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