Hi,
Archive bit helps incremental backup at file level. This be can be set to 0
if file has been already backed up and if not changed, so the next
incremental backup ignores it. If the file changes (more specifically the
the inode changes), archive bit will be set to 1 again for the next
incremental backup.
I wonder how journaling helps incremental backups in TSM as it can create a
so-called journal database for each filesystem. Is it the same as archive
bit mechanism or something different?

Thanks in advance.