On 3/10/2016 12:22 AM, Achilleas Mantzios wrote:
On 01/10/2016 03:55, John-Mark Gurney wrote:
Achilleas Mantzios wrote this message on Wed, Sep 28, 2016 at 13:26
+0300:
We have a weird situation here. We just made a clone of a virtual
image running Linux and sent it over to some could provider. The
problem is that the scp performance to *many* hosts in our office
center has worsened considerably, including one freebsd box.
In this freebsd box I run also a jail, and a linux ubuntu image
with bhyve. The crazy thing here is that :
1) scp from the original (local office center) linux image to the
host FreeBSD, its jailed FreeBSD and its bhyve linux is 2.7 MB/s
2) scp from the cloud linux image to the host FreeBSD is slow
(~300KB/s)
3) scp from the cloud linux image to the above FreeBSD's jail is
slow(~300KB/s)
4) scp from the cloud linux image to the above FreeBSD's bhyve
ubuntu is fast(~1->1.5MB/s)
What can cause this behavior?
PS
Please answer to me directly as I am not subscribed to -net.
Thanks a lot for any ideas.
I worked on this last year a bit, but was never able to track it down.
It may be an issue w/ internal SSH's buffering not growing properly to
handle the latency.
I posted some info on the wiki about this:
https://wiki.freebsd.org/SSHPerf
Thanks tons!
In this case of mine, just playing around with HPN:
HPNDisabled no
HPNBufferSize 8192
of course we just removed the HPN option for FreebSD's ssh/scp
what version are you using?
in sshd_config was enough to bring it on par with linux.
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