[ILUG] Dump very slow across gigabit network

[Conor Daly]

On Fri, Sep 14, 2007 at 07:15:46AM +0100 or so it is rumoured hereabouts, 
Paul O'Malley thought:
> Conor Daly wrote:
> >dump -0 -f remote:/dev/nst0 /filesystem
> > 
> >local and remote machines are connected by a crossover cable.  Their
> >connections show up in dmesg output as running at 1000bit full duplex.  I
> >can do:
> > 
> >scp /path/to/7.1Gb_file remote:
> > 
> >and get about 40Mb/s throughput which translates to about 2 hours for
> >300Gb.
> > 
> >Any clue why dump is taking so long?  The filesystem it's dumping has not
> >too many files, each file is fairly large (~2Gb).
> > 
> >Running dump on RHEL 5
> > 
> >Conor
> >
> 
> Seriously, although I am guessing here.
> 
> I think the fault is with the high end intel nic cards you are running.
> 
> Tell me you are running intel and I'll tell you what the problem is. ;-)
> 
> Regards,
> Paul

dmesg says:

eth1: Broadcom NetXtreme II BCM5708 1000Base-T (B2) PCI-X 64-bit 133MHz
found at mem ca000000, IRQ 169, node addr 001a646395ae

# cat /etc/modprobe.conf
alias eth1 bnx2


-- 
Conor Daly <conor.daly at cod.homelinux.org>
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