[OpenIndiana-discuss] Should I see a major slowdown when rsyncing to zfs nfs share

[Jonathan Adams]

If you're using rsync between computers over an existing secure link, then
don't bother with the ssh overhead and set up an rsync-daemon and you'll
get a much faster speed (and if you have riverbeds you even get
optimisation)

Jon

On 3 January 2015 at 16:21, Bob Friesenhahn <bfriesen at simple.dallas.tx.us>
wrote:

> On Fri, 2 Jan 2015, Harry Putnam wrote:
>
>>
>> I'm pretty sure it would be faster over ssh but haven't tried that
>> yet.
>>
>> Is this really abnormal?  Can any of you give some idea what I should
>> be expecting here?
>>
>
> It is normal.  NFS writes are synchronous writes.  Unless your server has
> special provisions to make synchronous writes fast, there will be a
> significant slow-down.
>
> Doing rsync over SSH the other way around (pull from server) or over a SSH
> login on the server (push to server) will be primarility limited by the
> performance of the SSH encryption algorithm used.
>
> For my home-grown backup system, I have the server use ssh to access the
> system to be backed up, using rsync to transfer the data, and the transfer
> is efficient.
>
> Bob
> --
> Bob Friesenhahn
> bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
> GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
>
>
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