[OpenAFS] Heavy performance loss on gigabit ethernet

[rader@ginseng.hep.wisc.edu]

 > ---- Original Message ----
 > From: Enrico Scholz
 > Hello,
 > 
 > we are using OpenAFS 1.2.11 in an environment where the fileserver has a
 > 1000Mb/s ethernet interface and the clients 100Mb/s ones. With this
 > setup we get really poor client-performance on large files; e.g. a 40 MB
 > sized file needs nearly 4 minutes for the transfer.

You may have clients getting horriable throughput because of fast
ethernet autonegotiation problems.  Check this with "iperf".

 http://dast.nlanr.net/Projects/Iperf/

You should get 90-95 Mbps.  If not, hardcode the clients and their
switch ports at 100 Mbps full-duplex.

steve
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