In the documentation for the MPI workflow the -import directory is shown similar to this:
advixe-cl --collect survey -trace-mpi --project-dir ./adviproj --search-dir all:r=/lustre/ttscratch1/green/collectorbug -- ./cpi
advixe-cl -project-dir ./new-adviproj -import-dir ./adviproj -mpi-rank 3 -search-dir all:r=/lustre/ttscratch1/green/collectorbug
Is this new directory "new-adviproj/" and import really required, or is it simply to extract out 1 rank's data so the analysis has far less data to analyze? from the documentation it was not clear if the import was necessary or just saving us clutter in the GUI analysis.
Yes. I believe your understanding is correct. I don't usually use import. I typically just set search directories during collection or I use -no-auto-finalize and set search paths in the GUI before I open the result.