On Fri, 5 Dec 2008, Alex Chekholko wrote:

> > - a built-in Fast Ethernet adapter (3com 3c509)

I have had a _lot_ of trouble with 3com Vortex/boomerang/tornado NICs
under high load - they tend to start emitting unswitchable packets which
splatter the entire network causing slowdowns on all machines and can
trigger other 3com cards into splattering bad packets too - giving a
packwet storm and overloaded switchports.

> > and an add-in Gigabit Ethernet adapter (Linksys rev 10)

You haven't given the model number. What does Linux detect it as?

If this is what I suspect it is then it's a NE2k unit based on the Realtek
2189 NIC - a very cheap and nasty memory-mapped networking device.

Try replacing both of these with a decent NIC that has a TCP offload
engine such as the Intel e1000 chipset. You _WILL_ see a significant
difference in throughput and CPU load.

AB


------------------------------------------------------------------------------
SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada.
The future of the web can't happen without you.  Join us at MIX09 to help
pave the way to the Next Web now. Learn more and register at
http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/
_______________________________________________
Bacula-users mailing list
Bacula-users AT lists.sourceforge DOT net
https://lists.sourceforge.net/lists/listinfo/bacula-users