Date: Mon, 3 Oct 2016 20:14:33 -0700 From: Julian Elischer <julian@freebsd.org> To: freebsd-net@freebsd.org Subject: Re: Strange issue with scp performance Message-ID: <4ab30b09-1228-3627-8719-6e782d4a0d82@freebsd.org> In-Reply-To: <57F2072B.6000403@matrix.gatewaynet.com> References: <57EB9AC8.3050102@matrix.gatewaynet.com> <20161001005558.GB1751@funkthat.com> <57F2072B.6000403@matrix.gatewaynet.com>
next in thread | previous in thread | raw e-mail | index | archive | help
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. > >> > >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4ab30b09-1228-3627-8719-6e782d4a0d82>