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

[Bob Friesenhahn]

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/