Abysmally slow write to geom class volume over network

[Jan Bramkamp]

On 12/10/2016 17:25, Michael Osipov wrote:
> Am 2016-10-06 um 20:34 schrieb Michael Osipov:
>> Hi folks,
>>
>> I am experiecing a performance breakdown when writing to some geom class
>> volume over network. I have tried SCP/SFTP, SMB, nc, ggated/ggatec from
>> Windows 10 and FreeBSD 10.3-RELEASE and I receive at most 500 kB/s.
>> Reading is superfast as well as writing to a regular, non-geom volume,
>> network is fully saturated.
>>
>> I am on:
>> # uname -a
>> FreeBSD bsd1home 10.3-RELEASE-p7 FreeBSD 10.3-RELEASE-p7 #0: Thu Aug 11
>> 18:37:29 UTC 2016
>> root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  i386
>>
>> Any idea what the problem is? How can I investigate on the penality in
>> performance?
>
> Seriously no one able to help?

Not with the description you've given.

Please describe the network setup, how you access remote block devices, 
what you mean by "geom volume".

The most common way to access remote storage at the block level 
supported by FreeBSD is iSCSI. FreeBSD 10.3 contains an iSCSI target and 
initiator in the base system.