These two lines:

unique files: slowest_rank_time: ...
unique files: slowest_rank_meta_time: ...

We should double check their meaning and clarify in the output:

• does slowest_rank_time include metadata time (rename it if not)
• did these values come from the same rank?
• what rank was the slowest counting both meta and IO time (which may be different than which was slowest in a single category)