On Mon, Apr 21, 2014 at 12:08:30AM -0600, Chris Murphy wrote:
> I see hard links as completely different to either subvolume/snapshot/reflink. Three hardlinks for a file all point to one file, they're aren't four unique files. But with the latter, three reflinks or snapshots are independent from the parent, including permissions/ACLs, and xattr including selinux labels.
You are correct, but if I'm deduping files for backups of the same data,
hardlinks work fine, but more importantly, they do not get lost if I copy
the filesystem to another machine.
reflink relationship pretty much gets lost no matter what tool you use,
except hopefully btrfs send/receive.
Marc
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