Date: Fri, 30 Sep 2016 17:55:58 -0700 From: John-Mark Gurney <jmg@funkthat.com> To: Achilleas Mantzios <achill@matrix.gatewaynet.com> Cc: freebsd-net@freebsd.org, Ilias Seperis <ilisepe1@gmail.com> Subject: Re: Strange issue with scp performance Message-ID: <20161001005558.GB1751@funkthat.com> In-Reply-To: <57EB9AC8.3050102@matrix.gatewaynet.com> References: <57EB9AC8.3050102@matrix.gatewaynet.com>
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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 -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."
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