http://docs.google.com/viewer?url=http://www.hyperchip.com/H40GPresentation.... --- oberman@es.net wrote: From: "Kevin Oberman" <oberman@es.net> To: nanog@shankland.org Cc: nanog@nanog.org Subject: Re: PacketShader Date: Mon, 23 Aug 2010 11:56:29 -0700
Date: Mon, 23 Aug 2010 06:27:00 -0700 From: Jim Shankland <nanog@shankland.org>
Mark Smith wrote:
On Mon, 23 Aug 2010 05:59:43 -0400 Valdis.Kletnieks@vt.edu wrote:
I missed that, and that answers the "was it a GigaBytes verses Gigabits error" question. Nothing new here by the looks of it - people in this thread were getting those sorts of speeds a year ago out of PC hardware under Linux -
http://lkml.org/lkml/2009/7/15/234
"I have achieved a collective throughput of 66.25 Gbit/s."
"We've achieved 70 Gbps aggregate unidirectional TCP performance from one P6T6 based system to another."
Very nice, but doing this with 1514-byte packets is the low-hanging fruit. (9K packets? That's the fruit that falls off the tree and into your basket while you're napping :-).) The more interesting limit: how many 40-byte packets per second can you shovel into this system and still have all of them come out the other end?
Seems reasonable, but in our testing of 100G Ethernet capable routers we found one that handled 8000 bytes just fine, but could only run 9000 byte packets at about 90G. Just a bit unexpected. Really, in this day and age, a chassis throughput of 100G is pretty trivial. When you start getting up to the Tbps range on a system using "standard components", then I'll be really interested. We do have a network of many end systems attached with 10Gbps Ethernet cards. I'm sure that we are not unique, though probably unusual. We are achieving stable disk to disk transfer rates of well over 3G between the US and Australia. I don't think that PacketShader would handle the load too well. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751 _____________________________________________________________ Get your own *free* email address like this one from www.OwnEmail.com