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Am 2012-01-09 12:03, schrieb Voelker, Bernhard:
Tomasz wrote:
I had network data transfer issue some time ago where transfers in one (A
to B) direction were at full network speed.. Transfers in opposite
directions (B to A) where going at 1 to 2 Kbit/sec.
Eventually the cause was tracked down and it turned out to be a duplex
mismatch caused by auto-negotiation protocols between two switches, and
also between one of the switches and one of the hosts
I once had experienced a similar bottleneck: it was solaris 10 with
10g cards, and turning off auto-negotiation solved the problem.
BTW: you still didn't show us the results with e.g. scp. I assume
it to be at the same level.
Have a nice day,
Berny
root@Marc:~# dd if=/var/samba/zerotest of=/dev/null bs=1M
10240+0 Datensätze ein
10240+0 Datensätze aus
10737418240 Bytes (11 GB) kopiert, 4,62835 s, 2,3 GB/s
sys 0m0.010s
root@Marc:~# date ; nc 10.99.11.6 1234 </var/samba/zerotest ; date
Mo 9. Jan 17:03:39 CET 2012
Mo 9. Jan 17:04:29 CET 2012
This mean about 220MByte/s disk to disk with the simplest possible
transmission.
I have send the raw transmission-infos with another mail.
- --
Mit freundlichen Grüßen / best regards
Ing. Rainer Pietsch
- ----------------------------------------------------------
PCS - Pichler Computer Systeme
Inh. Claudia Pichler-Pietsch
Hauptplatz 10
A-2751 Steinabrückl
Österreich / Austria
- ----------------------------------------------------------
mail: r.piet...@pcs-at.com
web: http://www.pcs-at.com
tel.: +43 (2622) 420 19 / 15
mobil: +43 (676) 31 242 69
fax: +43 (2622) 420 19 / 20
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