Network Throughput between jail and base system

Stefan Lambrev stefan.lambrev at
Thu Mar 6 22:13:09 UTC 2008


Ilias Marinos wrote:
> Hello all,
> 	I have a jail to my FreeBSD-STABLE, in which I run some
uname -a will be more helpful then "FreeBSD-STABLE".
> services.I have configured and setup this jail using ezjail-admin.
> marinosi at marinos:~$ jls
>    JID  IP Address      Hostname                      Path
>      1   ws			      /usr/jails/ws
> /usr/jails/ws
> #Jails
> ezjail_enable="YES"
> ifconfig_lo1=" netmask 0xffffffff" # Jail iface
> I use lo1 as jail interface and I nat internet traffic to it with pf:
> nat on $ext_if from $ws to any -> ($ext_if)
> 	Today I 've tried to scp a big directory inside the jail and
> I've noticed that I was secure copying with 2-3MB/s .That sounds too
> weird for me and I would like to hear some opinions , for what it may be
> the problem.
You should investigate where the bottle-neck is. It's probably not in
the network protocol.
Most probably it is limitation of your CPU or your HDD(s).
I think (not sure) jail have default limit to % of the CPU resources, so
if you encrypt the stream
most probably the limitation is in the CPU.
You can check for more
> Thanks a lot,
> Ilias Marinos
> --
> echo "Sysadmin know better bash than english." | sed s/min/mins/ \
> | sed 's/better bash/bash better/'
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