On 10/12/2016 02:02 AM, Guo-Rong Koh wrote:
On Tue, 2016-10-11 at 21:58 +0200, Martin Waldenvik wrote:
On 10/11/2016 09:14 PM, Dan McDonald wrote:
Dumb question - is your FreeBSD frame size jumbo? Also, try this on
OmniOS: ipadm set-prop -p send_buf=1048576 tcp ipadm set-prop -p
recv_buf=1048576 tcp And see if that helps if the frame size isn't
smaller on OmniOS. Dan Sent from my iPhone (typos, autocorrect, and all)
On Oct 11, 2016, at 1:53 PM, Martin Waldenvik <walden...@gmx.com
<mailto:walden...@gmx.com>> wrote: Hi I'm wondering if anyone can
shed some light on a problem I have. I'm using lftp sftp a lot and
it is very slow. I can work around that sometimes by using another
server. But I am also using zrep (using ssh) to replicate my pool to
a backup server. This is also slow. Transfer is about 40 megabyte
(omnios to omnios). When doing this on freebsd it is about 100
megabyte and it saturates my gigabit link (freebsd to freebsd). Same
hardware. I'm using the latest Omios LTS release and openssh. Is
there any way to speed this up on Omnios? Regards Martin
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Hi Dan

Thanks for your input. I have had this problem for a long time, then i
thought is was the old SunSSH but the problem seems to persist with OpenSSH.

I have not touched the frame size, the only thing i have is LACP with
L3,L4. Intel NIC on a supermicro board.

Tried to set send and recv buffer but there was no difference. It's
about the same speed with both sending and recieving ~40-45M/s.

I have found that zrep is simple enough for me that manually replicates
my system on an irregular basis. Maybe there is something that simple
around that works with netcat.

Hi Martin,

Have you considered changing/choosing the cipher used in the sftp transfer?
I found something like this:
https://turecki.net/content/getting-most-out-ssh-hardware-acceleration-tuning-aes-ni
enabled scp to saturate my gigabit link whilst saving CPU.

Prior to that, the default negotiated cipher seemed to peak at ~50MB/s.

regards,
Guo-Rong


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Thank you so much Guo-Rong for your help. When i changed from:
Ciphers chacha20-poly1...@openssh.com,aes256-...@openssh.com,aes128-...@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr

to Ciphers aes256-...@openssh.com,aes128-...@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr

I get full speed. I am so happy for this.

Warm regards
Martin

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