Date: Mon, 3 Oct 2016 10:22:19 +0300 From: Achilleas Mantzios <achill@matrix.gatewaynet.com> To: freebsd-net@freebsd.org, jmg@funkthat.com Cc: Ilias Seperis <ilisepe1@gmail.com> Subject: Re: Strange issue with scp performance Message-ID: <57F2072B.6000403@matrix.gatewaynet.com> In-Reply-To: <20161001005558.GB1751@funkthat.com> References: <57EB9AC8.3050102@matrix.gatewaynet.com> <20161001005558.GB1751@funkthat.com>
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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 in sshd_config was enough to bring it on par with linux. > -- Achilleas Mantzios IT DEV Lead IT DEPT Dynacom Tankers Mgmt
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