Re: FTP benchmark proposal

Jes Sorensen (Jes.Sorensen@cern.ch)
29 Jun 1999 09:37:13 +0200


>>>>> "Paul" == Paul M Hirsch <pauldoom@telebot.com> writes:

>> why? should we also use a single ide drive? multiple 100mb nics
>> simply do not aggregate traffic as well as a single gigabit card.
>> If I were setting up a site of this magnitude I sure as hell
>> wouldn't want to mess around with the silliness of having lots of
>> nics.

Paul> No no. A Gb card is the way to go in the real world, no
Paul> question, and it would be a cold day in hell before I would
Paul> choose multiple NICs over a Gb in this scenario. But, there are
Paul> cases where multiple NICs makes some sense. Consider the case
Paul> of a fileserver serving 4 subnets in a shop with only a routed
Paul> 100Mb backbone.

Could we try to focus on the issue here, please. Larry was suggesting
an FTP test, not a multi purpose do whatever you feel like in a LAN
setup.

The multi NIC issue is a totally different issue, it needs to be dealt
with (if it has not been done yet) but it is a different issue.

Talking about multi NIC setups, I was experiencing some really strange
things with 2.2.10 yesterday when I was hacking on the AceNIC Gigabit
driver. It seems to me that 2.2.10 at least sometimes has problems
deciding what interface to use for traffic. I have two PCs each with
two NICs in them, a GigE and a 100BaseT (with the GigE's being on
192.168.8.x and the 100BaseT's on 192.168.9.x), all connected through
the same switch. Now if I run traffic through the Gig cards over
192.168.8.x and shut down the GigE driver because I want to update it,
I sometime have problems talk to the other end at 192.168.9.x,
basically nothing seems to get through (guess it is time for tcpdump
at both ends).

I was wondering if Linux sometimes decides to send out all traffic on
one interface because it detects everybody's on the same switch or
whether it is something else fishy going on.

Jes

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/