wross@ius3.ius.cs.cmu.edu (William Ross) (06/06/90)
Suppose I have 2 Sun 4/330 machines on their
own Ethernet. I open a socket between the
machines and shove about 1MB of data over it.
This takes N seconds.
Suppose I now equip the machines with FDDI
interfaces. How long will it take to move
that same data? N/10? seconds? N/5 seconds?
Anyone have any clue? Anyone with a pair
of FDDI boards want to try this for me?
Besides FDDI, what are my other options for
moving that 1MB as fast as possible?
Thanks
Bill Ross
wross@cs.cmu.eduaaron@dragoon.telcom.arizona.edu (Aaron Leonard) (06/06/90)
> Suppose I have 2 Sun 4/330 machines on their > own Ethernet. I open a socket between the > machines and shove about 1MB of data over it. > This takes N seconds. > ... > Besides FDDI, what are my other options for > moving that 1MB as fast as possible? You might try out Ultra Technologies (ultra.com). They make an (up to) 1Gb network product called UltraNet. They claim 32Mbps socket-to-socket throughput between VME Suns. (They get 500Mbps socket-to-socket between Crays!) (_Unix Review_, April 1990.) I haven't experienced their products personally, but these guys seem sharp.
wasc@cgch.uucp (Armin Schweizer) (06/08/90)
In the system configuration you drawed up, it is likely, that the
transfer of 1 MByte takes the same time on ethernet as it does on
FDDI. The bottleneck in transferring files between just two machines
is NOT the ethernet, but the file transfer software. All
the en/decapsulation and buffer management work limits the
bandwidth below the one given by ethernet, even on an unloaded
machine.
regards
arminius
Armin R. Schweizer, CIBA-GEIGY AG, R1045.P.06, WRZ
4002 Basel / Switzerland
phone: -41-61-697'79'46
e-mail: cgch!wasc@relay.EU.net