Archiving While Modifying

[Mark McGranaghan <mmcgrana@gmail.com>]

Hi,

Does tarsnap have any particular semantics/guarantees for creating
archives of files that may be changing while tarsnap(1) is creating an
archive?  What about if the files being archived are only being
appended to? How would tarnsap handle a file that is rename(2)'d to
the name of a file that was in the process of being archived?

I'm asking because I'm considering tarsnap for use in backing up
datastores that use append-only file formats, which I hope will
benefit in particular from tarsnap's deduplication.

Thanks,
Mark