Company to test use of jumbo packets for grids

NETWORK WORLD NEWSLETTER: JEFF CARUSO ON HIGH SPEED LANS
07/14/05
Today's focus: Company to test use of jumbo packets for grids

Dear networking.world@gmail.com,

In this issue:

* Rutherford Research to examine jumbo packets
* Links related to High Speed LANs
* Featured reader resource
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Today's focus: Company to test use of jumbo packets for grids

By Jeff Caruso

Last time, I discussed how jumbo frames may be useful in grid or
server cluster environments. Some work on such usage is being
carried out by Canada's Rutherford Research.

Rutherford Research, which offers professional services for
research and development, is conducting its tests across CA*net
4, a high-performance optical network spanning Canada and funded
by its government.

The company notes that using jumbo packets can double
performance over Gigabit Ethernet in high-performance computing
environments, and can more than double performance in networks
running at even higher rates.

"While the use of jumbo packets might seem a wizard's tuning
trick, it represents a logical and immediately valuable benefit
to grid computing," the company writes on its Web site.

But how much of a benefit? The company says it is looking at how
big of a performance gain one can get from using jumbo frames
with various distributed applications, including massive data
transfer (the most obvious application), collaborative
visualization and distributed file systems.

The company's initial test bed conducts TCP transport across
Gigabit Ethernet sites. Using SGI servers and Linux and SGI
workstations, the firsts tests showed throughput of 400M bit/sec
"with significant potential for improvement."

Next, the company plans to test the effects of packet size
changes on NFS Version 4. It says that in NFS end node
fragmentation and reassembly can really hurt performance, and is
looking at increasing the maximum transfer unit to 9,000 bytes.
The company says it believes it can get throughput that is
vastly improved, close to that of a local storage-area network
using Fibre Channel.

RELATED EDITORIAL LINKS

Vendors tout WLAN security advances
Network World, 07/11/05
http://www.networkworld.com/nllan3292
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To contact: Jeff Caruso

Jeff Caruso is managing editor of online news for Network World.
He oversees daily online news posting and newsletter editing,
and writes the NetFlash daily news summary, the High-Speed LANs
newsletter and the Voices of Networking newsletter. Contact him
at <mailto:jcaruso@nww.com>
_______________________________________________________________
This newsletter is sponsored by Good Technology
Network World Executive Guide: Wireless Security. New Standards
make it easier than ever

As wireless LAN technology reaches the mainstream of enterprise
IT, security continues to be the top barrier to adoption. In
this report, we detail the possible approaches to wireless LAN
security and talk to experts who provide analysis and
recommendations on which ones to use. Register today and get a
free copy of Network World's Wireless Security Executive Guide.
http://www.fattail.com/redir/redirect.asp?CID=108304
_______________________________________________________________
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propagation and require an integrated security response, driven
by an asset-centric strategy. Tune in today, 24/7 and learn the
details.
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