[Borgbackup] hundreds of 17-byte files (1744 files out of 1762)

[Sitaram Chamarty]

Hi

I'm trying to use `par2` on a borg repository that I am
archiving long term; par2 uses Reed-Solomon coding to produce
extra files that help recreate the data as long as it's not too
damaged.

My borg repo is 3646 MB.  It has 1762 files, of which 1744 are
17-byte files with exactly the same content.  This seems to
completely throw off par2 in terms of performance.

I've asked the par2 folks also, but I thought it would be worth
asking here: why do all those files have exactly the same
content, and if so why are ther 1744 of them?

thanks!
sitaram

PS: Just FYI, some numbers:

    straight par2 on the borg repo:

        3851.39s u 3.65s s 702% 9:08.45 | 0 sw 0 maj 36063 min | 0 txt 0 dat 141 max

    If I tar up the repo and run par2 on the single tar file:

        516.79s u 1.81s s 601% 1:26.17 | 0 sw 0 maj 33887 min | 0 txt 0 dat 134 max

    Similarly, if I run it only on files not equal to 17 bytes

        500.60s u 1.73s s 679% 1:13.88 | 0 sw 1 maj 34525 min | 0 txt 0 dat 135 max