[RocketScientist]

Dear foamers,

I am facing a problem running redistributePar on a HPC cluster in collated mode using OF2206.

I am using redistributePar to profit from parallel decomposition and reconstruction. This works flawlessly in uncollated mode but I am running into the inode cap. Therefore, I tried using the collated mode to reduce the amount of files generated by OpenFOAM.

I tried adding the -fileHandler option in the Slurm script as follows

mpirun redistributePar -decompose -fileHandler collated -parallel

and also to include it in the controlDict by adding the following entry with and without the maxThreadFileBufferSize entry.

OptimisationSwitches
{
    fileHandler collated;
    maxThreadFileBufferSize 1e9;
}

However, when running the redistributePar tool, it always hangs at

Setting caseName to [...] to read undecomposed mesh

without posting any error message.

Does anybody have an idea how to resolve this issue?

Thank you guys for your help!

[Henrinavier]

Hey RocketScientist,

I once ran into a similar problem and circumvented it by reverting back to uncollated mode. Sadly, no "real solution" if you need to reduce the directoriy count.

If someone has a real solution, I'd be interested too...

Best regards,
Henrinavier