Has anybody had good success running BackupPC 4.x on a Raspberry PI?
Looks like a quite popular question.
Standard Raspbian software comes from Debian, and the present Debian (Buster) BackupPC package is (and will remain for quite some time) BackupPC 3: you have the choice of (a) installing BackupPC 4 from from the tarball - has been done (see https://github.com/backuppc/backuppc/issues/265), but is not quite evident, or (b) trying to run some other distro on the Raspberry (most of them, except Ubuntu, have packages that use BackupPC 4).
From the point of view of performance, I would be optimistic. I have had good experience porting a quite complex Gtk GUI (music catalogue application) from my PC to a Raspberry PI - amazing that, although the response times with the PI are slightly sluggish, the Raspberry turned out to be a quite acceptable alternative to the PC (I am using the 8GB RAM variant, but merely for being defensive).
The main question with respect to BackupPC is efficiency of Raspberry USB. My music application uses rsync to synchronise the catalogue (200 Gbytes) between the PC and the PI - works without problem, but is not super fast.
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