GNU parallel output progress while output to file
The behaviour you see is not what GNU Parallel is designed to do: --progress is normally sent to STDERR and not to STDOUT for exactly that reason:
$ seq 3 | bin/parallel --progress echo {} >/tmp/outComputers / CPU cores / Max jobs to run1:local / 8 / 3Computer:jobs running/jobs completed/%of started jobs/Average seconds to completelocal:0/3/100%/0.0s$ cat /tmp/out123Has there been local modifications of GNU Parallel? Can you reproduce the issue on other systems?
PS: instead of 'echo -n' why to try: --tag
Try to redirect it completely within the subshell using exec:
: > path_count.csv ## truncate filecat full_path.csv | parallel --progress -j +0 'exec >>path_count.csv; echo -n {},; pdfgrep -c [^_] {};'