[Duplicity-talk] par2 - what and when to use?

[MRob]

Is par2 like a tar format with extra bits added to facilitate recovering 
corrupt files? Is protection against files corrupt inside the archive or 
corrupt archive file itself? Is there a easy to understands overview?

I see to use it like "par2+gs://bucket" but I want to do some local 
backups that will use --no-encryption option and transport over sftp. Is 
still a good idea to do like "par2+sftp://address@hidden/path";?

If par2 is very powerful ability to protect against corruption, why 
isn't it promoted more regular on duplicity website, manpage, mailing 
list? Shouldn't it be in more of the examples?