Alternatives to rsync

George Michaelson ggm at
Thu Oct 13 06:32:03 UTC 2016

If you want block efficient, then zfs is your friend

1) make the 'dir' be a distinct zfs filestore in the zpool
2) run zfssnap on some duty cycle
3) profit

seriously: as long as the copy can be maintained readonly, in sync
with the source, the block level copy of zfs snapshots under some
serial/time cycle, does the job.

I ran this over mbuffer to get around ssh insane packet behaviour, I
only stopped when the client wanted to prune the copy and it ceased to
be a zfs snapshot copy.

Its much faster than rsync. Its at the filesystem block level.

On Thu, Oct 13, 2016 at 3:59 PM, Franco Fichtner <franco at> wrote:
>> On 13 Oct 2016, at 6:39 AM, reko.turja--- via freebsd-ports <freebsd-ports at> wrote:
>> The software should be relatively lightweight - no fullblown mirroring/backup is needed. Also hints how to achieve similar ends using maybe tar/ssh might do.
> Try cpdup(1).
> Cheers,
> Franco
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