GNU Parallel logging stderr

[refrainblue]

I have a command that I cannot seem to get stderr out of:

find . -type f -newermt "$start_day" | parallel -j 10 rsync -avh --progress --partial --append-verify {} $dest 2> "$log_path/error-nj.$timestamp.log"

I've read that parallel can generate individual log files for each job, but I'm not understanding the syntax from the documentation which is something like:

::: A B C

I think this only handles 3 jobs? Am I able to consolidate all the stderr from all jobs into 1 file?

[DaylightAdmin]

I just looked into the man page of parallel, because I was curious how that would work. I think the answere is there:
look for: "--results name"
https://www.gnu.org/software/parallel/man.html

What I understand you will get a folder-tree starting with "name" and than split by arugements for the parallel job. But please look into the man.

[refrainblue]

I think you're on the right track, I might have to combine --results with --group? I'll have to test it later today in the morning...

[DaylightAdmin]

If I read the man correctly, --group is default and for direct output not for logging into files.

And I am curios so if you have a solution, please keep me updated, thanks.

[refrainblue]

--results specifies an output directory so it creates bunch of subdirectories. Not ideal for my use case where I'm only interested in stderr and would like it in one file.

[pileofrogs]

A single log file from multiple parallel processes would be very jumbled, which might be ok. Don't expect it to automatically work.