Ethernet Channel Bonding (ECB)
siegert at sfu.ca
Mon Apr 22 20:45:41 EDT 2002
On Mon, Apr 22, 2002 at 06:01:22PM -0600, Timothy W. Moore wrote:
> I am new to the Beowulf cluster computing and am awaiting UPS to deliver
> my systems. I have been researching ECB and it seems to have mixed
> reviews regarding performance enhancement. Would/Could someone shed
> some light on this topic to the following effect:
>  Is it truly necessary?
That depends on the programs you are planning to run your cluster. With
respect to performance: I am getting 269Mbit/s bandwith with 3-way
channel bonded fast ethernet (using 3Com NICs). This is almost exactly
three times as much as I get from a single NIC. The latency is not quite
as good as with a single NIC: 55us vs. 43us (all numbers measured with
netpipe). Thus if your program doesn't need the bandwith or if your
program is extremely sensitive to latencies then you don't need channel
>  If using RedHat 7.2, should I re-compile the kernel?
Not necessarily. The bonding.o module is part of all RedHat kernels.
However, I strongly recommend upgrading the kernel to 2.4.18 - I had
problems with all earlier 2.4.x versions.
Academic Computing Services phone: (604) 291-4691
Simon Fraser University fax: (604) 291-4242
Burnaby, British Columbia email: siegert at sfu.ca
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