We have found mbuffer to be the fastest solution. Our rates for large
transfers on 10GbE are:
280MB/s mbuffer
220MB/s rsh
180MB/s HPN-ssh unencrypted
60MB/s standard ssh
The tradeoff mbuffer is a little more complicated to script; rsh is, well,
you know; and hpn-ssh requires rebuilding ssh and (probably) maintaining a
second copy of it.
-- Trey Palmer
________________________________________
From: zfs-discuss-boun...@opensolaris.org [zfs-discuss-boun...@opensolaris.org]
on behalf of Fred Liu [fred_...@issi.com]
Sent: Thursday, December 13, 2012 11:23 PM
To: Freddie Cash
Cc: zfs-discuss
Subject: Re: [zfs-discuss] any more efficient way to transfer snapshot between
two hosts than ssh tunnel?
>Add the HPN patches to OpenSSH and enable the NONE cipher. We can saturate a
>gigabits link (980 mbps) between two FreeBSD hosts using that.
>Without it, we were only able to hit ~480 mbps on a good day.
>If you want 0 overhead, there's always netcat. :)
980mbps is awesome! I am thinking running two ssh services -- one normal and
one with HPN patches only for backup job.
But now sure they can work before I try them. I will also try netcat.
Many thanks.
Fred
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