Thanks for that info Simon. The files system is Journaled HFS+ and I¹m running rsync version 3.1.2 protocol version 31.
I run rsync exclusively through the CLI/Terminal, so I¹m not sure what the version that comes with OSX is, but it is not the GUI version. On 6/3/16, 5:17 AM, "rsync on behalf of Simon Hobson" <rsync-boun...@lists.samba.org on behalf of li...@thehobsons.co.uk> wrote: >"McDowell, Blake" <mcdowe...@si.edu> wrote: > >> The storage is just an regular HDD in a mac pro tower. > >Ah, is this the version of rsync that comes with OS X ? Are these HFS+ >filesystems ? > >I vaguely recall that the OS X version is "hacked" to handle the file >semantics of HFS+ filesystems. Hopefully someone else actually knows the >details, I could be a bit wrong here, but IIRC it's something like : >On a "*nix" filsystem, a file is a file - a chunk of data and some >filesystem metadata. On HFS+, a file is comprised of up to 3 parts - the >data fork, the resource fork (I don't believe this is widely used these >days), and a chunk more metadata. "Regular" rsync only copies the data >fork and that part of the metadata that maps to *nix filesystem >semantics, the OS X version of rsync copies the whole file by way of >quite a kludge - can't remember if it needs an extra cmd line switch to >do this. >The kludge is to treat the data fork as one file, and the resource fork >plus metadata as another file. I vaguely recall that this means it does >something like : > >1) copy/sync data fork as one file >2) copy/sync resource fork as another file - put the bits together at the >destination > >From memory (it's a while since I last used rsync for doing backups), in >step 1 the files don't match because the destination file was modified >during step 2 of the last copy - thus the file gets synced again. Again >from memory, I think I used to see that every file with a resource fork >would be copied in it's entirety every time. > >This could be a complete red herring of course, but it's something I've >come across in the past/ > > > >-- >Please use reply-all for most replies to avoid omitting the mailing list. >To unsubscribe or change options: >https://lists.samba.org/mailman/listinfo/rsync >Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html -- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
