Hi, recently I had to sync really huge files (VM images), represented either as block devices (on one or both sides) or as regular files.
It *seemed* that Rsync didn't work well with block devices (the --copy-devices didn't 'work for me, maybe I'm stupid or it's broken in the Rsync that ships with Debian bullseye). And additionally I ran into performance and resource issues using Rsync for huge files. While this all can be my fault, I started a small project "bmapfs": a fuse driver that maps the huge file (or device) as a directory of files representing blocks of the backing file (or device). Using Rsync now on these smaller files I circumvented the above mentioned issues (be they real or just a result of my stupidity). Maybe you find bmapfs useful for other scenarios too. I'd be happy if you provide me feedback of *any* kind. https://gitea.schlittermann.de/hs12/bmapfs Best regards from Dresden/Germany Viele Grüße aus Dresden Heiko Schlittermann -- SCHLITTERMANN.de ---------------------------- internet & unix support - Heiko Schlittermann, Dipl.-Ing. (TU) - {fon,fax}: +49.351.802998{1,3} - gnupg encrypted messages are welcome --------------- key ID: F69376CE -
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